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Magadiite: NaSi7O13(OH)3·4(H2O) Rhodesite: KHCa2Si8O19·5(H2O)
Comments: Earth pale tan massive magadiite with dark yellow crystalline rhodesite.
Location: East Fork, Trinity River, Trinity County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species