Tags: Chemical Substance, Mineral.
Orpiment is a deep orange-yellow colored arsenic sulfide mineral with formula As2S3. It is found in volcanic fumaroles low temperature hydrothermal veins and hot springs and is formed both by sublimation and as a byproduct of the decay of another arsenic mineral realgar. It takes its name from the Latin auripigmentum (aurum − gold + pigmentum − pigment) because of its deep-yellow color.
