ORPIMENT (Arsenic Sulfide) - Amethyst GalleriesOrpiment is a rare mineral that usually forms with realgar. In fact the two minerals are almost always together. Crystals of orpiment are extremely rare as it usually.src stone orpiment crushers,Orpiment As2S3 - Handbook of MineralogyOrpiment. As2S3 c 2001-2005 Mineral Data Publishing, version 1. Crystal Data: Monoclinic. Point Group: 2/m. Commonly in foliated columnar or fibrous.Orpiment - WikipediaOrpiment is a deep-colored, orange-yellow arsenic sulfide mineral with formula As 2S 3. It is found in volcanic fumaroles, low-temperature hydrothermal veins,.
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