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Burgessite: Co2(H2O)4[(AsO3OH)]2·(H2O)
Comments: Rosettes of burgessite showing the individual lath-like crystals and their adamantine luster. (CanMin, v47:159). Location: Keeley mine, South Lorrain Township, Timiskaming District, Ontario, Canada.. Scale: Picture size 1.1 mm. © Canadian Mineralogist
Comments: SEM photographs of a rosette of burgessite. (CanMin, v47:159). Location: Keeley mine, South Lorrain Township, Timiskaming District, Ontario, Canada.. Scale: Picture size50 µm. © Canadian Mineralogist