The most important uranium glass manufacturers include Anchor Hocking, Hocking Glass, Hazel-Atlas, Federal Glass, Cambridge Glass, Heisey Glass, Jeannette Glass, Indiana Glass, Imperial Glass, McKee Glass, Westmoreland Glass, Akro Agate, United States Glass Company, and Macbeth-Evans. These companies produced millions of pieces from the late 1800s through the mid-20th century, creating everything from elegant Victorian art glass to Depression-era tableware that collectors actively seek today.
Learning who made a piece is one of the fastest ways to identify its age, rarity, quality, and value. Whether you’re searching flea markets, antique malls, estate sales, or online auctions, recognizing the characteristics of major manufacturers will dramatically improve your ability to spot authentic uranium glass.
Why Manufacturers Matter
When most people discover uranium glass, they focus on the glow.
Experienced collectors focus on who made it.
The manufacturer often tells you far more than the color alone. It provides clues about when the glass was produced, how it was manufactured, what patterns were available, how rare it may be, and how desirable it is in today’s collector market.
For example, a simple green dessert plate made by Hazel-Atlas may sell for only a few dollars, while a seemingly similar piece from Cambridge Glass Company could be worth many times more because of its superior craftsmanship, limited production, or desirable pattern.
Understanding manufacturers also helps collectors avoid one of the most common mistakes: assuming every glowing piece has the same history or value. Uranium glass was produced by dozens of companies over more than a century, and each manufacturer developed its own styles, colors, molds, and production techniques.
As your knowledge grows, you’ll begin recognizing subtle clues almost instantly. The shape of a handle, the style of pressed glass, the color of the glass under natural light, and even the intensity of the fluorescent glow can often point toward a specific maker.
That knowledge transforms collecting from simply buying glowing glass into researching the fascinating history behind every piece.
What Is a Uranium Glass Manufacturer?
A uranium glass manufacturer is a glass company that intentionally added small amounts of uranium oxide or uranium dioxide to molten glass during production. These uranium compounds acted primarily as coloring agents, producing shades of yellow, green, amber, or chartreuse while also giving the finished glass its famous fluorescent glow under ultraviolet light.
Contrary to popular belief, these companies were not producing radioactive novelty items. During the nineteenth and early twentieth centuries, uranium was simply another ingredient available to skilled glassmakers, much like manganese, cobalt, selenium, or gold, each of which produced different colors.
Most manufacturers used only a tiny percentage of uranium in their glass recipes—typically well under two percent of the finished product. The result was beautiful decorative glass that appeared perfectly ordinary under daylight but revealed its spectacular green fluorescence under ultraviolet illumination.
Manufacturers produced virtually every type of household glassware imaginable, including:
- Dinnerware
- Drinking glasses
- Pitchers
- Mixing bowls
- Serving dishes
- Candy dishes
- Vases
- Lamps
- Perfume bottles
- Ashtrays
- Salt and pepper shakers
- Children’s dishes
- Decorative figurines
Today these everyday household items have become highly collectible because they combine history, artistry, and the unmistakable glow that fascinates collectors around the world.
A Brief History of Uranium Glass Manufacturing
The story of uranium glass begins in Europe during the early nineteenth century.
Glassmakers in Bohemia—now part of the Czech Republic—experimented with uranium compounds as early as the 1830s. They discovered that adding uranium to molten glass produced beautiful translucent shades unlike anything previously available. Although the fluorescent properties of uranium glass would not become widely appreciated until ultraviolet lighting became common decades later, collectors today recognize these early European pieces as the foundation of uranium glass production.
American manufacturers soon adopted the technique.
By the late nineteenth century, dozens of American glass companies were experimenting with uranium-containing formulas. Improvements in industrial glassmaking allowed manufacturers to produce attractive household glassware at increasingly affordable prices, making uranium glass available to middle-class families rather than only wealthy households.
The industry’s golden age arrived during the first half of the twentieth century.
Companies such as Anchor Hocking, Hazel-Atlas, Federal Glass, Jeannette, Cambridge, and Heisey produced millions of pieces ranging from inexpensive Depression Glass to elegant hand-finished tableware.
The Great Depression actually increased production of many pressed-glass patterns because manufacturers sought affordable products that ordinary families could still purchase. Many of today’s most recognizable uranium glass patterns originated during this period.
Production changed dramatically during World War II.
As uranium became strategically important for military research and the Manhattan Project, civilian manufacturers largely stopped using uranium compounds in commercial glass. After the war, changing tastes, new manufacturing techniques, and public concerns about radioactivity prevented uranium glass from returning to its earlier popularity.
Although a limited amount of uranium glass has been produced since then, the vast majority of collectible pieces available today were manufactured before the mid-1940s.
That relatively short production window helps explain why authentic uranium glass remains so desirable among collectors.
Why Learning Manufacturers Makes You a Better Collector
Many beginning collectors purchase whatever glows brightest under a UV flashlight.
Over time, however, most collectors discover that the real enjoyment comes from learning the stories behind individual manufacturers.
Knowing the maker allows you to:
- Estimate the age of a piece.
- Recognize original patterns.
- Identify reproductions.
- Understand manufacturing quality.
- Estimate market value.
- Build focused collections.
- Appreciate the historical significance of individual companies.
Some collectors specialize exclusively in one manufacturer. Others build collections centered around a single pattern or production era. Still others enjoy comparing how different companies interpreted similar designs.
There is no right or wrong approach.
The more you learn about manufacturers, the more rewarding every antique store visit becomes. Instead of simply asking, “Does it glow?” you’ll begin asking, “Who made it, when was it made, and why is it special?”
That curiosity is what turns casual buyers into knowledgeable collectors.
How to Identify the Manufacturer of Uranium Glass
One of the first questions collectors ask after finding a glowing piece is:
“Who made it?”
Unfortunately, identifying uranium glass is rarely as simple as turning the piece over and finding a manufacturer’s name. Unlike modern glassware, most companies did not permanently mark every item they produced. Instead, experienced collectors learn to identify manufacturers by combining several clues, including the shape, pattern, color, construction, and any remaining factory marks.
The more pieces you examine, the easier this process becomes. Eventually you’ll begin recognizing the distinctive styles of individual manufacturers almost at a glance.
Look for a Maker’s Mark
Some manufacturers permanently marked at least part of their production with embossed logos, acid-etched trademarks, or molded initials.
These marks can often be found on:
- The base
- The center of plates
- Inside lids
- Around the foot of stemware
- Near handles
- Molded into the underside
Unfortunately, many uranium glass pieces were never marked at all. During the Depression Glass era, inexpensive tableware was produced quickly and economically, leaving little reason to add identifying trademarks.
Even when marks exist, years of wear may make them difficult to see.
A small flashlight held at an angle often reveals faint embossing that is invisible under normal room lighting.
Learn Common Glass Patterns
Pattern recognition is often far more useful than searching for a maker’s mark.
Most major manufacturers produced distinctive patterns that collectors have documented for decades. Once you become familiar with these designs, identification becomes much easier.
Some well-known examples include:
Manufacturer | Famous Patterns |
|---|---|
Anchor Hocking | Cameo, Princess, Block Optic |
Hazel-Atlas | Royal Lace, Newport, Criss Cross |
Jeannette | Cherry Blossom, Adam, Doric |
Federal Glass | Madrid, Sharon, Patrician |
Cambridge | Rose Point, Caprice |
Heisey | Crystolite, Colonial, Orchid |
Many experienced collectors can identify a manufacturer simply by recognizing one of these patterns.
Examine the Glass Color
Color can provide valuable clues.
Although many people associate uranium glass exclusively with bright green, manufacturers actually produced a surprisingly wide range of colors.
These include:
- Vaseline yellow
- Apple green
- Emerald green
- Chartreuse
- Amber-green
- Ice green
- Pale lime
- Custard glass
- Burmese glass
- Jadeite containing uranium (certain examples)
Some manufacturers consistently favored particular shades or color combinations.
For example, Cambridge often produced elegant crystal-like pieces with subtle uranium content, while Hazel-Atlas frequently manufactured brighter Depression-era tableware designed for mass production.
Color alone should never be used for identification, but it can help narrow the possibilities.
Study the Quality of the Glass
Every manufacturer developed its own production standards.
Higher-end companies generally produced:
- thinner walls
- smoother edges
- better polishing
- finer mold finishing
- sharper details
- more elaborate decorations
Luxury manufacturers such as Cambridge and Heisey emphasized craftsmanship.
Mass-production companies like Hazel-Atlas or Federal Glass focused on affordability and efficiency.
Neither approach is better—they simply served different markets.
Understanding these differences helps explain why two similar-looking pieces can have dramatically different values.
Compare Mold Details
Pressed glass was manufactured using molds.
Every mold leaves tiny clues.
Collectors often examine:
- seam lines
- mold joints
- edge shapes
- foot construction
- handle attachment
- base design
Older molds frequently produced sharper details than later reproductions.
Heavy wear inside production molds can also help estimate when an item was manufactured.
These subtle characteristics are one reason experienced collectors can often identify pieces that appear completely unmarked.
Use UV Light Correctly
A UV flashlight confirms uranium content—not the manufacturer.
Many beginners mistakenly believe that the brightness of the glow identifies who made the piece.
It doesn’t.
Glow intensity depends on several factors:
- uranium concentration
- glass chemistry
- glass thickness
- color additives
- wavelength of the UV light
- surrounding lighting conditions
Two pieces made by the same manufacturer may glow differently.
Likewise, pieces from different manufacturers may appear almost identical under ultraviolet light.
Think of the UV flashlight as an authentication tool rather than an identification tool.
Compare Reference Books and Catalogs
One of the best ways to identify manufacturers is by comparing your piece with original catalogs.
Many historic catalogs have survived and illustrate:
- complete dinnerware sets
- serving pieces
- advertisements
- factory names
- pattern numbers
- production years
Modern collector books build on this information with color photographs, rarity guides, and updated identification notes.
Keeping a few good reference books nearby is one of the best investments any serious collector can make.
Online Collector Communities
The internet has made manufacturer identification easier than ever.
Collector forums, Facebook groups, and online databases contain thousands of photographs submitted by experienced collectors around the world.
If you cannot identify a piece yourself, posting several clear photographs often produces surprisingly accurate results.
For the best chance of success, photograph:
- the entire piece
- the base
- close-ups of patterns
- handles
- lids
- any markings
- the piece under UV light
- the piece in normal daylight
The more information you provide, the easier identification becomes.
Common Identification Mistakes
Nearly every collector has made these mistakes at some point.
Assuming Every Green Glass Piece Is Uranium Glass
Many types of antique green glass contain no uranium whatsoever.
Always verify with a quality UV flashlight.
Believing Every Glowing Piece Is Valuable
Glow alone does not determine value.
Rarity, condition, manufacturer, pattern, and collector demand are usually much more important.
Ignoring Reproductions
Modern reproductions exist for some popular patterns.
Always compare details carefully before paying premium prices.
Relying on One Clue
Experienced collectors rarely identify a piece using only one characteristic.
Instead, they combine multiple clues:
- pattern
- color
- manufacturing quality
- mold details
- known production years
- factory marks
- documented examples
The more evidence that points toward a particular manufacturer, the more confident you can be in your identification.
Building Your Manufacturer Knowledge
The easiest way to become proficient at identifying uranium glass manufacturers is to study one company at a time.
Rather than trying to memorize dozens of names at once, begin with the manufacturers whose pieces are most commonly found at antique stores and estate sales.
As your collection grows, you’ll quickly notice that each company developed its own personality. Some specialized in elegant stemware, others produced colorful Depression Glass, while a few became famous for children’s dishes, kitchenware, or decorative art glass.
In the following sections, we’ll examine each of the major uranium glass manufacturers in detail, exploring their history, most famous patterns, identifying characteristics, collectibility, and the pieces that continue to captivate collectors today.
Major Uranium Glass Manufacturers
While dozens of companies produced uranium glass during the late nineteenth and early twentieth centuries, a handful of manufacturers account for most of the pieces collectors encounter today. Each developed its own distinctive styles, patterns, and production methods, making them recognizable with experience.
The following companies represent the most important names in American uranium glass production and provide an excellent starting point for learning to identify antique glassware.
Anchor Hocking Corporation
Founded: 1937 (through the merger of Anchor Cap & Closure Corporation and Hocking Glass Company)
Location: Lancaster, Ohio
Known For: Depression Glass, everyday tableware, kitchenware
Anchor Hocking is one of the most recognized names in American glassmaking and is often the first manufacturer new collectors encounter. Although the company officially formed in 1937 through the merger of Anchor Cap & Closure Corporation and Hocking Glass Company, its roots extend back to the early twentieth century.
During the Great Depression, Anchor Hocking produced attractive, affordable glassware that millions of American families could purchase. Much of this tableware contained uranium, giving it the brilliant green fluorescence collectors enjoy today.
Unlike luxury manufacturers that targeted wealthy customers, Anchor Hocking focused on producing durable glassware for everyday use. Their products were sold through department stores, grocery store promotions, and mail-order catalogs, allowing families to build matching dinnerware collections over time.
Because of this widespread distribution, Anchor Hocking remains one of the easiest manufacturers for beginning collectors to find.
Popular Uranium Glass Patterns
Several Anchor Hocking patterns have become favorites among collectors:
- Princess
- Block Optic
- Cameo (also known as Ballerina)
- Waterford
- Old Café
- Spiral
These patterns range from simple geometric designs to elegant floral motifs and continue to appear regularly at antique malls and estate sales.
Identification Tips
Anchor Hocking pieces often feature:
- Excellent mold quality
- Crisp geometric patterns
- Thick, durable construction
- Bright green fluorescence
- Consistent manufacturing quality
Some later pieces bear the familiar Anchor Hocking “Anchor H” trademark, although many Depression-era examples remain unmarked.
Collectibility
Anchor Hocking is an excellent manufacturer for beginning collectors because pieces remain relatively affordable. Common plates, bowls, and cups can often be purchased inexpensively, while complete serving sets, unusual forms, and pristine examples command considerably higher prices.
Hocking Glass Company
Founded: 1905
Location: Lancaster, Ohio
Known For: Early Depression Glass
Before the Anchor Hocking merger, the Hocking Glass Company had already established itself as one of America’s largest producers of pressed glass.
The company specialized in practical household glassware, introducing colorful products that appealed to families during difficult economic times. Its production methods emphasized efficiency without sacrificing attractive designs, making Hocking one of the defining manufacturers of Depression Glass.
Many pieces produced before the 1937 merger are virtually indistinguishable from later Anchor Hocking products unless pattern references or original documentation are available.
Identification Tips
Collectors often identify Hocking pieces by:
- Early production dates
- Classic Depression Glass patterns
- Heavy pressed construction
- Bright uranium fluorescence
- High production quality
Because so many Hocking patterns continued after the merger, studying pattern guides is often the best method of distinguishing early Hocking production from later Anchor Hocking examples.
Hazel-Atlas Glass Company
Founded: 1902
Headquarters: Wheeling, West Virginia
Known For: Colorful Depression Glass and kitchenware
Hazel-Atlas became one of America’s largest glass manufacturers through mass production, innovation, and aggressive marketing.
The company manufactured everything from food jars and refrigerator containers to elegant tableware, with uranium glass forming an important part of its colorful product line during the 1930s and early 1940s.
Because Hazel-Atlas distributed its products nationwide, collectors frequently encounter its glass in antique stores, flea markets, and estate sales.
Popular Patterns
Some of the company’s best-known uranium glass patterns include:
- Royal Lace
- Newport
- Criss Cross
- Cloverleaf
Royal Lace remains especially desirable because of its intricate pressed design and elegant appearance.
Identification Tips
Hazel-Atlas pieces often feature:
- Distinctive pressed patterns
- Excellent clarity
- Consistent green coloration
- Well-defined mold details
Many examples carry the familiar “HA” logo inside a capital H, although not every piece was marked.
Collectibility
Hazel-Atlas offers something for every collector. Common dinnerware remains affordable, while rare serving pieces, unusual colors, and complete pattern sets continue to increase in value.
Federal Glass Company
Founded: 1900
Location: Columbus, Ohio
Known For: Colorful tableware, Depression Glass, restaurant glass
Federal Glass Company built its reputation by producing attractive, affordable pressed glass for American households. Throughout the first half of the twentieth century, the company manufactured an enormous variety of tableware, serving dishes, tumblers, and decorative pieces, many of which incorporated uranium for their distinctive fluorescent glow.
Federal Glass successfully balanced affordability with style, creating products that appealed to both everyday consumers and department store buyers. As a result, its uranium glass remains among the most commonly encountered by collectors today.
Popular Patterns
Federal produced numerous collectible patterns, including:
- Madrid
- Sharon
- Patrician
- Georgian
Many of these designs feature bold geometric elements and richly textured surfaces that reflect the Art Deco influences of the era.
Identification Tips
Federal Glass pieces typically display:
- Strong mold definition
- Heavy pressed-glass construction
- Bright fluorescence under UV light
- High-quality mold finishing
Some later pieces include the familiar shield-shaped Federal trademark with an “F,” although many Depression-era examples are unmarked.
Collectibility
Federal Glass offers excellent value for collectors. Individual pieces remain relatively affordable, making them ideal for beginners, while complete sets, uncommon serving pieces, and pristine examples are increasingly sought after by experienced collectors.
Cambridge Glass Company
Founded: 1901
Location: Cambridge, Ohio
Known For: Elegant glassware, fine stemware, etched patterns, high-end tableware
Among American glass manufacturers, few names command as much respect as Cambridge Glass Company. While many companies focused on producing inexpensive pressed glass for everyday households, Cambridge built its reputation on exceptional craftsmanship, elegant designs, and premium-quality crystal.
Collectors often describe Cambridge as one of the finest American glass companies of the twentieth century.
Although the company produced a wide variety of clear crystal and colored glass, several patterns incorporated uranium, creating pieces that combine refined artistry with the brilliant fluorescence that uranium glass collectors love.
Unlike mass-market manufacturers, Cambridge targeted customers looking for luxury rather than affordability. Their products frequently appeared in upscale department stores, bridal registries, and fine dining collections.
Today, Cambridge uranium glass occupies the higher end of the collector market.
Famous Cambridge Patterns
Some of the company’s best-known patterns include:
- Rose Point
- Caprice
- Chantilly
- Diane
- Wildflower
- Martha
Many were offered in elegant stemware, serving bowls, candleholders, and decorative centerpieces.
Identification Tips
Cambridge pieces often feature:
- Exceptionally clear, high-quality glass
- Fine hand-finishing
- Delicate etched decorations
- Thin, elegant construction
- Excellent polishing
- Superior mold quality
Some examples bear the famous “C” inside a triangle trademark, although many earlier pieces remain unmarked.
Collectibility
Cambridge uranium glass is highly desirable because it combines artistic beauty with limited production.
Collectors especially seek:
- Complete stemware sets
- Covered candy dishes
- Rare serving pieces
- Etched floral designs
- Original matching sets
Excellent condition is especially important, as chips along the delicate rims can significantly reduce value.
Heisey Glass Company
Founded: 1895
Location: Newark, Ohio
Known For: Elegant crystal, exceptional craftsmanship, luxury tableware
If Cambridge represented elegance, Heisey Glass Company represented perfection.
Founded by Augustus H. Heisey, the company quickly established a reputation for producing some of America’s highest-quality glassware. Every stage of production emphasized precision, resulting in crystal-clear glass with remarkable brilliance and consistency.
Although Heisey manufactured relatively little uranium glass compared to some competitors, the pieces it did produce are among the finest examples available today.
Popular Patterns
Collectors frequently search for:
- Crystolite
- Orchid
- Colonial
- Plantation
- Ridgeleigh
Many feature delicate floral etching combined with graceful shapes that distinguish Heisey from more utilitarian manufacturers.
Identification Tips
Look for:
- Extremely clear glass
- Smooth polished pontils
- Crisp decorative cutting
- Elegant proportions
- Thin walls
- High-quality finishing
Many later examples display the familiar Diamond H trademark molded into the base.
Collectibility
Heisey remains one of the premier names in American elegant glass.
Collectors value:
- Scarcity
- Craftsmanship
- Beautiful finishing
- Strong auction demand
Complete matching sets often command premium prices.
Jeannette Glass Company
Founded: 1898
Location: Jeannette, Pennsylvania
Known For: Depression Glass, affordable household tableware
Jeannette Glass Company helped define the American Depression Glass era.
During the economic hardships of the 1930s, the company produced colorful pressed glass that ordinary families could afford. Many pieces were distributed through grocery store promotions, movie theater giveaways, and department store incentives, making attractive tableware accessible despite difficult financial times.
Today, Jeannette remains one of the most recognizable names among uranium glass collectors.
Popular Patterns
Some of the company’s most collectible patterns include:
- Cherry Blossom
- Adam
- Doric
- Doric & Pansy
- Sunflower
- Windsor
Cherry Blossom remains particularly popular because of its detailed floral decoration and wide range of available serving pieces.
Identification Tips
Jeannette pieces often feature:
- Bold floral motifs
- Pressed-glass construction
- Bright fluorescence
- Heavy household durability
- Distinctive decorative borders
Most Depression-era examples were not permanently marked.
Collectibility
Jeannette offers collectors an excellent balance between affordability and historical significance.
Many common pieces remain inexpensive, while unusual serving items, covered dishes, and complete pattern collections continue to appreciate in value.
Indiana Glass Company
Founded: 1907
Location: Dunkirk, Indiana
Known For: Pressed glass, tableware, decorative glass
Indiana Glass Company operated for nearly a century, producing an enormous variety of household glassware. While much of its later production occurred after uranium glass had largely disappeared from commercial manufacturing, early examples containing uranium remain highly collectible.
The company became known for dependable quality, practical designs, and broad distribution throughout North America.
Identification Tips
Collectors look for:
- Thick pressed-glass construction
- Excellent mold quality
- Traditional geometric designs
- Bright UV fluorescence
- Durable household forms
Indiana Glass can occasionally be confused with Federal or Hazel-Atlas, making pattern recognition especially important.
Collectibility
Indiana Glass appeals to collectors seeking attractive, affordable additions to their collections.
Individual pieces remain relatively easy to locate, although uncommon colors and serving pieces continue to rise in value.
Imperial Glass Company
Founded: 1901
Location: Bellaire, Ohio
Known For: Elegant pressed glass, decorative art glass, Molly pattern
Imperial Glass Company successfully combined artistic design with efficient manufacturing, producing some of the most recognizable pressed-glass patterns of the early twentieth century.
Collectors particularly admire Imperial’s decorative serving pieces, candleholders, and tableware, many of which display excellent mold detail and distinctive styling.
One of the company’s best-known uranium patterns is Molly, an elegant Art Deco design that has become increasingly popular with collectors.
Identification Tips
Imperial pieces frequently display:
- Sharp mold definition
- Decorative geometric styling
- Excellent clarity
- Heavy pressed construction
- Rich uranium fluorescence
Some later production carries the familiar Imperial IG trademark.
Collectibility
Imperial occupies an attractive middle ground between affordability and rarity.
Common dinnerware remains accessible, while unusual decorative pieces and complete Molly sets are considerably more valuable.
These manufacturers represent the transition from mass-market Depression Glass to higher-end elegant glass, giving collectors a broad understanding of the diverse styles and quality levels found in uranium glass. The remaining sections will cover McKee Glass Company, Akro Agate Company, Westmoreland Glass Company, United States Glass Company, Corning Glass Works/Macbeth-Evans, followed by comparison tables, buying advice, and collector FAQs that tie the guide together.
McKee Glass Company
Founded: 1853
Location: Pittsburgh, Pennsylvania (later Jeannette, Pennsylvania)
Known For: Kitchenware, tableware, opaque glass, early uranium glass
McKee Glass Company was one of America’s oldest and most respected glass manufacturers. With roots stretching back to the mid-nineteenth century, the company earned a reputation for producing durable household glassware that combined practical function with attractive design.
While McKee is perhaps best remembered today for its kitchenware and opaque glass products, the company also manufactured uranium glass during the early decades of the twentieth century. Although its uranium production was smaller than that of companies like Hazel-Atlas or Anchor Hocking, surviving examples are highly appreciated by collectors.
McKee specialized in everyday household products designed to withstand regular use. Mixing bowls, refrigerator dishes, measuring cups, and tableware were built to last, making intact uranium glass examples surprisingly common despite their age.
Identification Tips
McKee uranium glass often features:
- Heavy construction
- Thick glass walls
- Smooth mold finishing
- Functional rather than ornate designs
- Bright green fluorescence
Some later products carry the familiar McK trademark, although many uranium pieces remain unmarked.
Collectibility
McKee appeals to collectors who enjoy practical antique kitchenware. Refrigerator dishes, measuring cups, and complete kitchen sets are especially desirable because they represent everyday American life during the early twentieth century.
Akro Agate Company
Founded: 1911
Location: Clarksburg, West Virginia
Known For: Glass marbles, children’s dishes, novelty items
Akro Agate occupies a unique place in uranium glass history.
Unlike most manufacturers that concentrated on dinnerware and elegant table settings, Akro Agate became famous for producing glass marbles, children’s tea sets, miniature dishes, and novelty items.
Many of these products incorporated uranium glass, giving them an unexpected glow under ultraviolet light.
Collectors frequently discover Akro Agate pieces at estate sales because they were marketed as inexpensive toys rather than decorative antiques.
Today, those same toys have become highly collectible.
Popular Items
Collectors often seek:
- Children’s tea sets
- Miniature dishes
- Toy cups
- Toy pitchers
- Marbles
- Small novelty pieces
The company’s marbles are particularly popular among collectors who specialize in both antique marbles and uranium glass.
Identification Tips
Akro Agate products usually feature:
- Small size
- Bright colors
- Thick pressed construction
- Excellent mold quality
- Strong fluorescence
Children’s dishes are often mistaken for dollhouse accessories because of their miniature scale.
Collectibility
Although many Akro Agate pieces remain affordable, complete children’s sets and rare marble varieties continue to increase steadily in value.
Westmoreland Glass Company
Founded: 1889
Location: Grapeville, Pennsylvania
Known For: Elegant decorative glass, milk glass, specialty glassware
Westmoreland Glass Company developed a reputation for beautiful decorative glass with exceptional craftsmanship.
Although best known for milk glass, the company also produced uranium glass in a variety of decorative forms. These pieces frequently display ornate patterns, graceful shapes, and excellent finishing.
Westmoreland catered to customers seeking decorative display pieces rather than inexpensive household tableware.
Identification Tips
Collectors should look for:
- Elegant decorative styling
- Excellent finishing
- Fine mold work
- Delicate patterns
- Bright uranium fluorescence
Many later pieces display the familiar intertwined WG trademark.
Collectibility
Westmoreland uranium glass generally attracts experienced collectors because of its artistic designs and relatively limited production.
Covered dishes, animal figurines, and decorative serving pieces are especially desirable.
United States Glass Company
Founded: 1891
Headquarters: Pittsburgh, Pennsylvania
Known For: Large-scale glass production, pressed glass, tableware
Rather than operating as a single factory, United States Glass Company consisted of numerous glassworks brought together under one corporate organization.
This allowed the company to manufacture an enormous variety of glassware ranging from inexpensive household products to elegant decorative pieces.
Its uranium glass production covered nearly every category imaginable, including:
- Tumblers
- Plates
- Serving bowls
- Compotes
- Lamps
- Vases
- Decorative novelties
Because production occurred at multiple factories, identifying United States Glass pieces can be challenging.
Identification Tips
Collectors often rely on:
- Pattern references
- Original catalogs
- Mold characteristics
- Construction details
- Historical documentation
Few pieces carry permanent maker’s marks.
Collectibility
United States Glass offers tremendous variety.
Collectors enjoy building pattern-specific collections while historians appreciate the company’s important role in American industrial glassmaking.
Corning Glass Works and Macbeth-Evans
Corning Founded: 1851
Macbeth-Evans Founded: 1899
Known For: High-quality household glass and innovative manufacturing
Macbeth-Evans became famous for producing elegant translucent glass, particularly its beautiful Monax line.
Following acquisition by Corning Glass Works, the company’s manufacturing expertise expanded further, resulting in some of America’s finest household glass products.
Although uranium glass represented only a small portion of production, surviving examples demonstrate the company’s commitment to quality.
Identification Tips
Collectors often recognize Macbeth-Evans pieces by:
- Smooth, refined surfaces
- High manufacturing quality
- Elegant shapes
- Excellent clarity
- Fine mold finishing
Some examples carry acid-etched trademarks or molded logos.
Collectibility
Macbeth-Evans uranium glass is generally less common than comparable products from Federal or Hazel-Atlas, making attractive examples increasingly sought after.
Collectors particularly appreciate serving pieces and elegant table settings.
Comparing the Major Uranium Glass Manufacturers
Every manufacturer had its own strengths, production methods, and target market. Understanding these differences helps explain why two similar-looking pieces can vary dramatically in rarity and value.
Manufacturer | Best Known For | Difficulty to Find | Collector Interest |
|---|---|---|---|
Anchor Hocking | Depression Glass | Easy | High |
Hocking Glass | Early pressed glass | Moderate | High |
Hazel-Atlas | Colorful tableware | Easy | High |
Federal Glass | Depression Glass | Easy | High |
Cambridge | Elegant glass | Difficult | Very High |
Heisey | Luxury crystal | Difficult | Very High |
Jeannette | Floral patterns | Moderate | High |
Indiana Glass | Household glass | Moderate | Moderate |
Imperial | Decorative pressed glass | Moderate | High |
McKee | Kitchenware | Moderate | Moderate |
Akro Agate | Children’s glass and marbles | Moderate | High |
Westmoreland | Decorative art glass | Difficult | High |
United States Glass | Wide product range | Moderate | High |
Macbeth-Evans | Elegant tableware | Difficult | High |
Which Manufacturers Are the Most Valuable?
While value depends on condition, rarity, color, and pattern, experienced collectors generally place these manufacturers near the top of the market:
- Heisey Glass Company – Exceptional craftsmanship and elegant designs.
- Cambridge Glass Company – Fine crystal and highly sought-after etched patterns.
- Imperial Glass Company – Rare decorative forms and distinctive Art Deco styling.
- Westmoreland Glass Company – Limited production and ornate decorative pieces.
- Macbeth-Evans – Elegant translucent glass with relatively scarce uranium examples.
That doesn’t mean common manufacturers lack value. A rare Hazel-Atlas serving piece or an unusual Anchor Hocking pattern can easily sell for more than an average Cambridge plate. Condition, rarity, and collector demand always outweigh the manufacturer’s name alone.
Best Manufacturers for Beginning Collectors
If you’re just starting a uranium glass collection, these manufacturers offer the best combination of availability, affordability, and variety:
- Anchor Hocking
- Hazel-Atlas
- Federal Glass
- Jeannette Glass
- Hocking Glass
These companies produced millions of pieces, making them easier to find in antique malls, flea markets, and estate sales. They also provide an excellent introduction to identifying patterns, learning production techniques, and understanding how different manufacturers approached uranium glass.
As your knowledge grows, you can gradually expand into scarcer makers such as Cambridge, Heisey, and Westmoreland, where rarity and craftsmanship often command higher prices.
Manufacturer Marks and Logos
One of the biggest misconceptions among new collectors is that every piece of uranium glass should have a manufacturer’s logo. In reality, many antique glass companies never permanently marked much of their production. During the height of Depression Glass manufacturing, speed and affordability were often more important than branding, so millions of pieces left the factory completely unmarked.
Fortunately, manufacturers sometimes used embossed trademarks, acid-etched logos, paper labels, or foil stickers that can help identify a piece. Learning these marks is an excellent skill for any collector.
Common Manufacturer Marks
Manufacturer | Common Mark | Notes |
|---|---|---|
Anchor Hocking | Anchor inside an “H” | Primarily found on later production. |
Hazel-Atlas | H over A | One of the easiest marks to recognize. |
Federal Glass | Shield with an “F” | Usually molded into the base. |
Heisey | Diamond with an “H” | Highly collectible mark. |
Cambridge | Triangle containing a “C” | Often found on elegant glassware. |
Imperial | IG | Used on many later pieces. |
Westmoreland | Interlocking WG | More common on later production. |
McKee | McK | Not present on every piece. |
Even when a piece lacks a mark, collectors can often identify the manufacturer by studying the pattern, mold details, color, and overall construction.
Timeline of Major Uranium Glass Manufacturers
The history of uranium glass spans more than a century. While European factories pioneered uranium-colored glass during the early 1800s, American manufacturers dominated production from the late nineteenth century through World War II.
Manufacturer | Founded | Uranium Glass Era | Notes |
|---|---|---|---|
United States Glass | 1891 | Early 1900s–1940s | Large corporate group of factories |
Westmoreland | 1889 | Early 1900s | Decorative specialty glass |
Heisey | 1895 | Early 1900s–1940s | Elegant glass |
Jeannette | 1898 | 1920s–1940s | Depression Glass |
Federal | 1900 | 1920s–1940s | Mass-produced tableware |
Cambridge | 1901 | Early 1900s–1940s | Luxury glass |
Imperial | 1901 | 1920s–1940s | Decorative pressed glass |
Hazel-Atlas | 1902 | 1920s–1940s | Household glass |
Hocking | 1905 | 1905–1937 | Later became Anchor Hocking |
Indiana Glass | 1907 | Early production | Household tableware |
Akro Agate | 1911 | 1920s–1940s | Children’s glass and marbles |
World War II effectively ended large-scale uranium glass production in the United States as uranium became a strategic material for military use.
America’s Glassmaking Heartland
One interesting fact many collectors don’t realize is that most major uranium glass manufacturers were concentrated in just a few states.
The greatest concentration of factories existed in:
- Ohio
- Pennsylvania
- West Virginia
- Indiana
These regions offered abundant natural gas, high-quality silica sand, coal, rail transportation, and a skilled workforce. Together they became known as America’s “Glass Belt,” producing millions of pieces of household glassware during the late nineteenth and early twentieth centuries.
If you visit antique shops throughout the Midwest today, you’ll often find far more uranium glass than in other parts of North America simply because so much of it was originally sold there.
Which Manufacturers Produced the Brightest Glow?
Collectors frequently ask whether certain manufacturers used more uranium than others.
The answer is not necessarily.
The brightness of uranium glass depends on several factors:
- The amount of uranium oxide used
- The thickness of the glass
- Other coloring agents in the formula
- The wavelength of the UV flashlight
- The color of the glass itself
A thick Hazel-Atlas mixing bowl may appear to glow much brighter than an elegant Cambridge wine glass, even though both contain similar amounts of uranium.
Likewise, Vaseline glass often appears brighter than emerald-green glass because its lighter color allows more fluorescence to pass through the glass.
This is why experienced collectors never judge rarity or value solely by glow intensity.
Most Collectible Patterns by Manufacturer
Although every manufacturer produced dozens of designs, a handful of patterns remain especially popular with collectors.
Manufacturer | Popular Patterns |
|---|---|
Anchor Hocking | Princess, Cameo, Block Optic |
Hazel-Atlas | Royal Lace, Newport, Cloverleaf |
Federal Glass | Madrid, Sharon, Patrician |
Jeannette | Cherry Blossom, Adam, Doric |
Cambridge | Rose Point, Caprice |
Heisey | Crystolite, Orchid |
Imperial | Molly, Candlewick-style pieces |
Indiana Glass | Tiara, Sandwich-style reproductions |
Learning these signature patterns makes identifying unmarked glass significantly easier.
Building a Manufacturer Collection
Every collector eventually develops a personal collecting style. Some enjoy acquiring a little of everything, while others focus on a single manufacturer and attempt to build a comprehensive collection.
Popular collecting approaches include:
Collect One Manufacturer
Some collectors dedicate their displays entirely to companies such as Cambridge or Heisey, appreciating the subtle differences between patterns produced over several decades.
Collect One Pattern
Others pursue a favorite pattern, such as Cherry Blossom or Royal Lace, assembling complete dinnerware sets over time.
Collect One Color
Many enthusiasts display only emerald green, while others specialize in Vaseline yellow or rare blue-green uranium glass.
Collect One Type of Glassware
Rather than collecting complete sets, some collectors focus on:
- Vaseline vases
- Candy dishes
- Salt and pepper shakers
- Oil lamps
- Toothpick holders
- Children’s dishes
- Figurines
There is no “correct” way to collect uranium glass. The best collection is the one that reflects your own interests.
Buying Checklist for Collectors
Before purchasing any piece of uranium glass, take a few moments to inspect it carefully.
Ask yourself:
☐ Does it fluoresce under UV light?
☐ Is the pattern correctly identified?
☐ Can the manufacturer be determined?
☐ Are there chips or cracks?
☐ Has the rim been repaired?
☐ Is the base heavily scratched?
☐ Is the price consistent with recent market values?
☐ Does it fit your collection?
A careful inspection often prevents expensive mistakes and helps you purchase pieces you’ll enjoy for years.
Caring for Uranium Glass
Proper care helps preserve antique glass for future generations.
To protect your collection:
- Wash pieces by hand using mild soap and warm water.
- Avoid sudden temperature changes that may crack the glass.
- Do not stack plates without protective padding.
- Store heavy pieces securely.
- Keep decorative items away from high-traffic areas.
- Dust displays regularly with a soft microfiber cloth.
Although uranium glass is generally safe to own and display, treating it as you would any valuable antique will help maintain its beauty and value.
Frequently Asked Questions
Which uranium glass manufacturer is the most collectible?
Collectors generally consider Cambridge and Heisey among the most desirable because of their exceptional craftsmanship, while rare Imperial, Westmoreland, and Cambridge pieces often achieve the highest auction prices.
Which manufacturer is best for beginners?
Anchor Hocking, Hazel-Atlas, Federal Glass, and Jeannette produced millions of affordable pieces that are still widely available today.
Are all uranium glass pieces marked?
No. Many authentic pieces have no manufacturer’s mark at all. Pattern recognition, construction quality, and historical references are often more useful than logos.
Did every manufacturer produce green uranium glass?
No. Uranium was used to create a variety of colors, including yellow, chartreuse, amber-green, and certain opaque glasses. The familiar bright green is simply the most common.
Does a brighter glow mean a piece is more valuable?
No. Glow intensity depends largely on glass chemistry and thickness rather than rarity. A common piece may glow brilliantly, while an extremely rare example may exhibit only moderate fluorescence.
Finally…
The history of uranium glass is, in many ways, the history of American glassmaking itself. From elegant crystal produced by Cambridge and Heisey to the affordable Depression Glass manufactured by Anchor Hocking, Hazel-Atlas, Federal, and Jeannette, each company contributed its own designs, innovations, and craftsmanship to a collecting hobby that continues to grow in popularity.
Learning to recognize manufacturers is one of the most rewarding skills a collector can develop. With experience, you’ll begin identifying pieces by their patterns, shapes, colors, and construction long before reaching for a UV flashlight.
As Uraniumware continues to expand, this guide will serve as the central reference for individual manufacturer profiles, helping collectors explore each company in greater depth while building a richer understanding of the people and factories behind these remarkable glowing antiques.
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