Very Rare Dark Metallic Gray Chalcostibite mostly* pseudomorphed by blue Azurite and green Malachite.
Dimensions (millimeters): 22 x 22 x 14 (small gemstone)
Dimensions (inches): .9 x .9 x .55 (petite sample)
Chemical Formula – CuSbS2 Origins: Rar-el-Anz, Cherrat Wadi, Casablanca Prefecture, Grand Casablanca Region, Morocco, Africa
Thumbnail specimen, housed in small acrylic museum box. *There is some of the metallic chalcostibite showing though the external crystal structure. A specimen of chalcostibite that have been partially replaced by bright blue azurite and green malachite, a phenomenon peculiar to this locality near Casablanca. RARE!
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