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Melanothallite: Cu2OCl2 Chloromenite: Cu9O2(SeO3)4Cl6
Comments: Olive green crystalline chloromenite on blue-green melanothallite. Location: North Break, Second Cone of main fracture eruption, Tolbachik Volcano, Kamchatka District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Melanothallite: Cu2OCl2
Comments: Bluish green melanothallite grain. Location: North Break, Second Cone, Main Eruption Site, Tolbachik, Kamchatka District, Russian Far East, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species