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Vurroite: Pb20Sn2(Bi,As)22S54Cl6
Comments: SEM image of a jack-straw aggregate of vurroite crystals. (CanMin, v43:703). Location: Fumarole (400-600 deg C) Pb-Bi epithermal deposit of La Fossa crater, on Vulcano Island, Italy. Scale: See Image. © Canadian Mineralogist