Cranberry glass
（重定向自Gold ruby glass）
![Vintage cranberry glass bowl](/Images/godic/202501/15/Vintage_cranberry_glass4054.jpg")
![The beaker with lid made from Gold Ruby is attributed to Johann Kunckel.](/Images/godic/202501/15/Goldrubinglas_Schatzkammer_München4054.jpg")
![The 4th-century Lycurgus Cup, a 4th-century Roman glass cage cup made of a dichroic glass](/Images/godic/202501/15/Brit_Mus_13sept10_brooches_etc_0464054.jpg")
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.