Hutchinsonite, Orpiment

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The finest specimens of this rare Thallium, Lead, Arsenic sulfosalt come from this mine, and this piece is no exception as it has some fantastic quality crystals. The species is named after Dr. Arthur Hutchinson (1866-1937), who was a mineralogy professor at Cambridge. The piece hosts several dozen individual crystals and crystal "sprays" of sharp, metallic, lustrous Hutchinsonite which are associated with orange Orpiment and possibly some minor Engarite on matrix. Ex. Harvard and Gene Sensel Collections.