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Mineralpedia Details for Embreyite

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Embreyite

Embreyite

Named in honor of Peter Godwin Embrey, an English mineralogist for the British Museum of Natural History in London, England. Embreyite is a rare mineral that occurs in Russia at the Berezovskoe gold deposit in the Urals region, in the Argent mine in South Africa, at the Callenberg North No.1 open cut in Saxony, Germany, and in the Le Cantonnier vein in Aquitaine, France. At its Russian locality it occurs on museum samples from the oxidized gold-bearing quartz veins. Associated minerals include crocoites, phoenicochroite, vauquelinite, cassedanneite, cerussite, fornacite, pyromorphite, and mimetite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/embreyite.pdf

Formula
Pb5(CrO4)2(PO4)2┬ĚH2
Crystal System
Monoclinic 
Cleavage
None, None, None 
Luster
Earthy (Dull) 
Color
orange 
Streak
yellow 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Uneven 
Hardness
3.5 
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Embreyite from Callenberg North, Open Cut, Saxony, Germany

Embreyite
            from Callenberg North, Open Cut, Saxony, Germany

Bright orange-yellow crystalline crust of Embreyite associated with Crocoite and Pyromorphite.

Click thumbnail images for larger view.

Embreyite from Tsvetnoy mine, Berezovskoye Au deposit, Central Urals, Russia

Embreyite
            from Tsvetnoy mine, Berezovskoye Au deposit, Central Urals, Russia

Bright yellow crust or powdering.

Click thumbnail images for larger view.

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