orpiment
Noun
Meaning
Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing.
Source: Webster's dictionarySynonyms
corn
color
yellow
pigment
arsenic
cinnabar
chalcopyrite
cerussite
covellite
chalcocite
argentite
arsenopyrite
proustite
bornite
wurtzite
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Examples
Orpiment ( As 2 S 3 ) and realgar ( As 4 S 4 ) are somewhat abundant and were formerly used as painting pigments.