Uranium Glass Early 1880-1900 antique

Set of 7


Dealers and collectors who authenticate antique glass are grateful for the phenomenon that turns clear glass yellow under a long wave of black ultraviolet light; it proves the glass was manufactured before 1915 when manganese -- the element that makes glass glow yellow -- was discontinued. This is a color variant on "Vaseline" glass, which glows green because of uranium salt compounds in its chemical makeup.

One needs to account for the variations in ultraviolet lights used for testing, and their degrees of fluorescence. Light may be absorbed in one fluorescent wavelength, then emitted at another, lower energy wavelength along the ROYGBIV, or visible light, spectrum. Manganese, lead, uranium salt, or variable wavelengths are all factors that can produce a yellow glow in clear glass.


shipping cost, if you purchase more than one lot, please, wait for me to send you a combined shipping cost to save you on shipping costs before you pay. Glass Early 1880-1900 s. Selling as it