Minerals and Metals in Ancient India v2.c47.118

v2.c47.118

*Orpiment* : Arsenic Trisulphide As₂S₃. Soft. Colour lemon yellow of different shades. Name a corruption of Latin name *auripigmentum* or golden paint. Also used as a depilatory agent. Associated with *Realgar* which is Arsenic Monosulphide, AsS. *Realgar* is sectile, soft resinous luster. Colour aurora-red or orange-yellow. Found with stibnite, lead, silver and gold. Gives brilliant white light when ignited with saltpetre. Disintegrates on exposure ‘*Realgar*’ name from *Rahj al ghār* (Arabic), powder of the mine.