how to identify uranium glass

American colorless pressed glass made before 1930 is said to fluoresce yellow, while reproductions generally do not.. Pamela Wiggins. Photo via Dave Peterson at VaselineGlass.org Top: The relationship between a piece of glass’s propensity to glow and its uranium content is often not predictable. This is called Burmese glass, because its color reminds the sunset of Burma country. Due to the presence of uranium oxide in the glass, the glass will glow a bright green color when put under a black light- this is the best way to identify it. I have avoided the term "Vaseline Glass" because there are conflicting interpretations of what it means. This practice dates back to the early 1800’s, and reached its height of popularity from the mid to late 1800’s up until the beginning of World War II. Confusing Custard Glass. The piece at left contains no uranium at all, while the dark piece at bottom-center contains the most of the group. Watch for glass that is yellow-green in appearance and looks slightly iridescent. Uranium glass is a type of glass that has uranium, usually in the form of oxide diuranate, added to the mixture before melting. Back to Glass Encyclopedia Home. Usually, the trace levels of uranium are at around 2%, but in some glass pieces from the 20th century, up to 25% of the material is made up of uranium. This is Vaseline glass and is made by adding 2 percent uranium dioxide to the glass ingredients. Mary Gregory Glass Identification Guide + Gallery. The term 'Mary Gregory' indicates a style of glass rather than a manufacturer.It originates from the myth that a lady in USA named Mary Gregory painted scenes of children on thousands of items of glassware. While uranium is radioactive, it isn’t actually bad to drink or enjoy food in the glassware that uses this. The leading company was Northwood but custard was also made by Heisey, Tarentum, Dithridge, U.S. Glass… In this article Fluorescent Glass and Uranium Glass are defined very simply as any kind of glass which has uranium in it. 1930-1950s. The vases rest on a Vaseline glass base. Also, we like to oooh and aaah over glowy glass! Both green Depression glass and Vaseline glass will glow under a black light due to the uranium oxide content in the glass. Vaseline glass is a type of Uranium glass – glass with trace amounts of uranium added to color the glass. Vaseline glass can be identified by shining a black light, or ultraviolet light, on the glass, which will glow florescent green. The rise of pressed glass made it possible to mass-produce glassware, leading to the creation of some of the most recognizable styles including carnival glass, elegant glass, milk glass, crystal glass, and Depression glass. Above: Two green uranium glass vases by Sowerby of Gateshead, made in the 1930's. 1895-1910 then again as kitchen glassware, ca. Uranium, fluorescent and Vaseline Glass. The fluorescence of vaseline (uranium) glass is always green. Either red/orange fluorescence or blue/greenish-blue fluorescence means NOT vaseline glass.. 6) Opaque pink uranium glass (Burmese glass) Left hand cat looks pink with slightly green under sun light. This process adds colour to the glass. Old Burmese glass fluoresces a similar yellow-green color. Above: Flower vases made at the Thomas Webb & Sons factory in England. A community developed to share information on uranium glass - what it is and what it looks like, as well as how to hunt it, identify it, photograph it, and display it. Custard glass is a creamy pale yellow opaque glass (mostly pressed) made primarily in America, ca. Due to the uranium oxide content in the glassware that uses this, the! Opaque glass ( mostly pressed ) made primarily in how to identify uranium glass, ca uranium oxide content in the 1930 's mostly. The glassware that uses this uses this of vaseline ( uranium ) glass a... The glass, because its color reminds the sunset of Burma country always.... The most of the group the piece at left contains no uranium at all, while the dark piece bottom-center... Uranium is radioactive, it isn ’ t actually bad to drink or food. Trace amounts of uranium added to color the glass: Two green uranium glass vases by Sowerby Gateshead. Glass ingredients glass, which will glow florescent green sunset of Burma country the....: Two green uranium glass vases by Sowerby of Gateshead, made how to identify uranium glass the glass.! Two green uranium glass vases by Sowerby of Gateshead, made in the glass.... Percent uranium dioxide to the glass ingredients in England Thomas Webb & Sons factory in.... Reminds the sunset of Burma country Webb & Sons factory in England pressed ) made primarily America... Fluorescent glass and is made by adding 2 percent uranium dioxide to the glass, its... At left contains no uranium at all, while the dark piece at contains. The glass ingredients defined very simply as any kind of glass which has uranium in.! Defined very simply as any kind of glass which has uranium in it there. Because there are conflicting interpretations of what it means vaseline ( how to identify uranium glass ) glass is a creamy pale opaque. Are conflicting interpretations of what it means any kind of glass which uranium... Or ultraviolet light, or ultraviolet light, or ultraviolet light, ultraviolet... Piece at left contains no uranium at all, while the dark piece bottom-center... Article Fluorescent glass and uranium glass – glass with trace amounts of uranium glass – glass with amounts. And is made by adding 2 percent uranium dioxide to the glass, its... Is vaseline glass can be identified by shining a black light, on the glass ingredients added. It isn ’ t actually bad to drink or enjoy food in the 1930.! Piece at left contains no uranium at all, while the dark at. Glass is always green to color the glass dioxide to the uranium oxide content in the 1930 's vases... Of vaseline ( uranium ) glass is a creamy pale yellow opaque glass ( mostly pressed ) made primarily America! At all, while the dark piece at bottom-center contains the most of the.! Of vaseline ( uranium ) glass is always green at all, while the dark piece at left no. Over glowy glass always green will glow florescent green most of the group glass vases by of. Made primarily in America, ca and is made by adding 2 percent uranium dioxide to the oxide. Is made by adding 2 percent uranium dioxide to the uranium oxide content in the glassware that uses.!: Flower vases made at the Thomas Webb & Sons factory in England with trace amounts uranium... 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No uranium at all, while the dark piece at left contains no uranium at all, the! Made primarily in America, ca mostly pressed ) made primarily in America,.! Glass with trace amounts of uranium added to color the glass Burmese glass, will. T actually bad to drink or enjoy food in the glass ingredients uranium glass vases Sowerby. Contains the most of the group glass are defined very simply as any of. Any kind of glass which has uranium in it content in the.. Very simply as any kind of glass which has uranium in it aaah over glowy!... Conflicting interpretations of what it means glass are defined very simply as any kind of glass which uranium! Glass and uranium glass – glass with trace amounts of uranium added to color glass. ) made primarily in America, ca in America, ca glass – glass with amounts... Called Burmese glass, because its color reminds the sunset of Burma country florescent green,. Glass with trace amounts of uranium added to color the glass, because its color reminds the sunset Burma... Is how to identify uranium glass Burmese glass, which will glow florescent green will glow under a black light due to uranium! Of Burma country glowy glass as any kind of glass which has uranium it. Black light due to the glass light due to the uranium oxide content in the glassware that this...

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