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Mineralpedia Details for Crookesite

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Crookesite

Crookesite

Formula
Cu7TlSe4 
Crystal System
Tetragonal 
Crystal Habit
Disseminated 
Cleavage
Good, None, None 
Luster
Metallic 
Color
blue gray, brown pink, gray 
Class
Tetragonal - Disphenoidal 
Fracture
Brittle 
Hardness
2.5-3 
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Crookesite from Bukov mine, Rožná deposit, Vysočina, Moravia, Czech Republic

Crookesite
            from Bukov mine, Rožná deposit, Vysočina, Moravia, Czech Republic

Metallic blue-grey crystal grains throughout mass. Ex. Pequa Rare Minerals.

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