orpiment/ˈɔːpɪmənt/EtymologyFrom Middle English orpyment, from Old French orpiment, from Latin auripigmentum (“orpiment”), from aurum (“gold”) + pigmentum (“pigment”).orpiment means arsenic trisulphide, occurring naturally in crystals or massive deposits, formerly used as a dye or pigment. Lexicurio rates it Rare gem — a strength score of 78 out of 100.nounArsenic trisulphide, occurring naturally in crystals or massive deposits, formerly used as a dye or pigment.“Jeremiah found himself indoors, perfecting his Draftsmanship, bending all day over the work-table, grinding and mixing his own Inks,— siftings and splashes ev'rywhere of King's Yellow, Azure, red Orpiment, Indian lake, Verdigris, Indigo, and Umber.”