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Cyanotrichite: Cu4Al2(SO4)(OH)12·2(H2O)
Comments: Blue, hairy crystals of cyanotrichite. Location: Grandview mine, Grand Canyon, Coconino County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Cyanotrichite: Cu4Al2(SO4)(OH)12·2(H2O) Azurite: Cu3(CO3)2(OH)2
Comments: Blue, hairy crystals of cyanotrichite with dark-blue, blocky azurite on a green, malachite matrix. Location: Maid of Sunshine Mine, Cochise County, Arizona, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Blue, acicular sprays of cyanotrichite on a gray matrix. Location: Maid of Sunshine Mine, Cochise County, Arizona, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species