Glass of a deep red color that is produced by a colloidal gold solution prepared by dissolving gold in aqua regia, sometimes including some tin or silver salts. Gold ruby glass was made by the ancient Egyptians and Romans; the ancient technique was lost until rediscovered in 17th-century Germany. Gold was also thought to be anti-toxic and to protect from poison anyone who drank from it. (en)
Vidrio de color rojo oscuro producido por un precipitado de oro o cobre. (es)
Glas met een donkerrode kleur die wordt geproduceerd door middel van een neerslag van goud of koper. (nl)