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Klyuchevskite: K3Cu3(Fe+++,Al)O2(SO4)4 Klyuchevskite-Duplicate: K3Cu3Fe+++O2(SO4)4
Comments: Clusters of dark green radiating prismatic klyuchevskite crystals associated with langbeinite, co-type sample. Klyuchevskite-duplicate is the same mineral with different Dana numbers. Location: Yadevitaya fumarole, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: See Image. © Rruff Database