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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
Kolarite: PbTeCl2
Comments: Steel-gray, metallic, massive, polished fragment of kolarite embedded in epoxy. Location: Oktyabr'sky Mine, Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian. Scale: See Image. © Rruff Database
Kostovite: CuAuTe4
Comments: Dark gray metallic fragment of kostovite embedded in epoxy. Location: Chelopech Mine, Chelopech Obshchina, Balkan Mts (Stara-Planina Mts), Sofiya (Sofia) Oblast, Bulgaria. Scale: See Image. © Rruff Database
Krasnovite: Ba(Al,Mg)(PO4,CO3)(OH)2·(H2O)
Comments: Pastel blue, vitreous massive krasnovite, associated with white ankerite. Location: Cerro Sapo Carbonatite dike, Cochabamba, Bolivia. Scale: See Image. © Rruff Database
Labuntsovite-Fe: Na4K4(Ba,K)2(Fe,Mg,Mn)1+xTi8(Si4O12)4(O,OH)8·10(H2O)
Comments: Orange labuntsovite-Fe in matrix. Location: Desourdy Quarry, Mont St. Hilaire, Rouville County, Quebec, Canad. Scale: See Image. © Rruff Database
Levyne-Na: (Na2,Ca,K2)Al2Si4O12·6(H2O)
Comments: White tabular hexagonal-shaped levyne-Na crystals associated with analcime. Location: Dallas, Oregon, USA. Scale: See Image. © Rruff Database
Magnesioanthophyllite: (Mg,Fe++)7Si8O22(OH)2 Anthophyllite: [ ]Mg7Si8O22(OH)2
Comments: Schistose amphibolite rock composed primarily of anthophyllite (magnesioanthophyllite is now considered to be anthophyllite). Location: Winchester, Riverside County, California, USA. Scale: See Image. © Rruff Database
Malanite: Cu(Pt,Ir)2S4
Comments: Epoxy grain mount of silver gray metallic polished fragment of malanite. Location: Placer concentrate from Philipp Massif, Kamchatka, Russia. Scale: See Image. © Rruff Database
Manaksite: KNaMn++Si4O10 Bario-olgite: Na(Ba,Sr,Na,REE)PO4
Comments: Pale brown massive manaksite associated with grayish-green bario-olgite, purple ussingite and colorless serandite. Location: Palitra pegmatite, Kedykverpakhk Mountain, Lovozero massif, Kola Peninsula, Russia. Scale: See Image. © Rruff Database
Marinellite: [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O)
Comments: Colorless to pale bluish-gray anhedral marinellite crystal. Location: Monte Cavalluccio, Sacrofano, Campagnano di Roma, Italy. Scale: See Image. © Rruff Database