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Mcguinnessite: (Mg,Cu)2(CO3)(OH)2 Vuagnatite: CaAlSiO4(OH)
Comments: Translucent colorless vuagnatite microcrystals with mcguinnessite.
Location: Near Red Mountain, Mendocino County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Comments: Cotton ball clusters of vivid blue mcguinnessite crystals on matrix.
Location: Miners Ridge, Red Mountain, Mendocino County, California, USA.
Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals