Blakeite

minerals

emmonsite

tellurium

mackayite

Formula: Fe3+2(Te4+O3)3 (?)
Tellurite, questionable as a mineral species
Specific gravity: 3.1
Hardness: 2 to 3
Streak: Yellowish brown
Colour: Brown or dark reddish brown, golden yellow to yellowish brown and brown in transmitted light
Environments

Hydrothermal environments

Localities

At the type locality, the Mohawk mine, Goldfield, Goldfield Mining District, Esmeralda county, Nevada, USA, blakeite occurs very sparingly as microcrystalline crusts resting on unaltered emmonsite crystals and associated with tellurium, pyrite and mackayite (AM 29.211-225, Mindat).

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