Information from the Getty AAT
mosaic gold
A yellowish-gold artificial pigment composed of stannic sulfide. Mosaic gold was used in gilding and by illuminators from the 13th century until the 19th century when it was superseded by bronze powders.
History of technique in the arts, 1500-1950
A yellowish-gold artificial pigment composed of stannic sulfide. Mosaic gold was used in gilding and by illuminators from the 13th century until the 19th century when it was superseded by bronze powders.