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Lavendulan: copper/arsenic mineral & Acanthite: silver/sulfur mineral

Orpiment in Calcite / Shimen Mine, Hunan, China

Calcite on Améthyst from Brazil(pièce de musée)

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Pentagonite is a rare silicate mineral with formula Ca(VO)Si4O10·4(H2O). It was named for the unusual twinning which produces an apparent five-fold symmetry. It is a dimorph of cavansite.

Light blue Topaz perched atop Lepidolite

Acanthite (the silver crystals) between amethyst crystals.

Petitjeanite. Schneeberg, Erzgebirge, Sachsen, Deutschland Taille=6 mm Copyright Stephan Wolfsried