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Woodruffite

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ALB177032

Woodruffite

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Description
Locality: 
Ojuela Mine, Mapimi, Durango, Mexico
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 2 × 1.6 cm
Description

Very interesting piece of crystallized (!) woodruffite. Usually this mineral forms botroidal and globular masses, but in this case it has needles. Associapted probably with hemimorphite.

Mineral Data
What's on the rock

Woodruffite

Formula: 
Zn(Mn4+,Mn3+)5O10·3½H2O
Strunz: 
4.FL.25
Hardness: 
4.5
Streak: 
Brown
Type Locality: 
Passaic pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA

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