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Stokesite: CaSnSi3O9·2(H2O)
Comments: Colorless transparent stokesite microcrystal in albite. Location: Corrego do Urucum, Galileia, Minas Gerais, Brazil. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Thick, tabular crystals of stokesite, perched atop a 2 cm sphere of feldspar crystals. Location: Corrego do Urucum, near Galilea, Minas Gerais, Brazil. Scale: 3.3 x 2.5 x 2 cm. © Rob Lavinsky
Stokesite: CaSnSi3O9·2(H2O) Stannomicrolite: (Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7
Comments: Stokesite "ball" composed of lath-like tan or clear crystals with several micro crystals of yellow stannomicrolite. Location: Urucum mine, Galileia, Minas Gerais, Brazil. Scale: 1.2 cm. © Tom Loomis / Dakota Matrix