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Hemimorphite

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PDM666661

Hemimorphite

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Description
Locality: 
Mfouati Mine, Mfouati District, Bouenza Department, Congo (Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.8 × 3 cm
Description

Showy 360º specimen of botryoidal hemimorphite with intense blue colour, very good lustre and translucence, on a compact matrix. Some yellow mimetite crystals are also present at the rear side. These are getting less and less common nowadays.

Ex. A. Gelders specimen.

Mineral Data
What's on the rock

Hemimorphite

Formula: 
Zn4Si2O7(OH)2·H2O
Strunz: 
9.BD.10
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Băiţa Mining District (Baita Bihor; Rézbánya), Nucet, Bihor Co., Romania

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