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Malladrite: Na2SiF6 Avogadrite: (K,Cs)BF4
Comments: Botryoidal pinkish-white avogadrite with yellow malladrite. Location: Eruption of 1926, Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Yellow-orange crystalline malladrite with pinkish white avogadrite. Location: Eruption of 1926, Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species