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Mineralpedia Details for Brianyoungite

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Brianyoungite

Brianyoungite

Brian Young is the namesake of the mineral as a field geologist and mineralogist of the British geological Survey and the provider of the initial specimens. At the type locality at the Brownley Hill mine in Cumbria, England, it is found as a secondary most mine mineral in oxidized lead0zinc ores which were hosted by limestone and in association with gypsum, smithsonite, pyrite, and goethite. Additional localities include in Belgium, Germany, Greece, and Australia, among a few others.

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

Formula
Zn3CO3(OH)4 
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
2-2.5 
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Brianyoungite from Wellgill vein, Brownley Hill Mine, Nenthead, Cumbria, England

Brianyoungite
            from Wellgill vein, Brownley Hill Mine, Nenthead, Cumbria, England

Clear acicular crystals to about 0.75mm. Looks much like Hydrozincite.

Click thumbnail images for larger view.

Brianyoungite from Gelbe Birke mine, Schwarzenber, Saxony, Germany

Brianyoungite
            from Gelbe Birke mine, Schwarzenber, Saxony, Germany

White micro silky crystals across matrix.

Click thumbnail images for larger view.

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