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Cranberry glass or Gold Ruby glass is a red glass made by adding gold salts or colloidal gold to molten glass. Tin, in the form of stannous chloride, is sometimes added in tiny amounts as a reducing agent. The glass is used primarily in expensive decorations.
Glastechnische Berichte (1967), 40 (12), 481-4CODEN: GLBEAQ; ISSN:0017-1085.
The craft was then lost and rediscovered in the 17th century period by either Johann Kunckel in Potsdam or by the Florence glassmaker Antonio Neri. Neither of them knew the mechanism which yielded the colour, however. Chemist and winner of the 1925 Nobel Prize in Chemistry Richard Adolf Zsigmondy was able to understand and explain that small of gold were responsible for the red colour.
The most famous period of cranberry glass production was in 19th century Britain during the Victorian Era.
Cranberry glass creations were most popular as a table display, often holding confectionery or .
Cranberry glass was also frequently used for wine glasses, , and . Cranberry glass was also well known for its use in "Mary Gregory" glass. This glass had a white enamel paint fired onto the glass in a design, usually with a romantic theme.
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