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Chalcomenite & Derriksite

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SMM948830

Chalcomenite & Derriksite

Type Locality for demesmaekerite
Rare Mineral

Description Tabs

Description
Locality: 
Musonoi Mine, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 3 × 2.5 cm
Description

Beautiful, blue, glassy clusters of chalcomenite crystals coat some vugs of the matrix and a very nice, dark green, shiny, spherical cluster of derriksite crystals nestled in a vug. There are also some non-perfect pale olive green demesmaekerite crystals. Excellent specimen.

Boxed with Label
Mineral Data
What's on the rock

Chalcomenite

Formula: 
CuSeO3·2H2O
Strunz: 
4.JH.05
Crystal System: 
Orthorhombic
Hardness: 
2.0 - 2.5
Type Locality: 
Cerro de Cacheuta, Sierra de Cacheuta, Mendoza, Argentina

Derriksite

Formula: 
Cu4(UO2)(SeO3)2(OH)6·H2O
Strunz: 
4.JG.30
Hardness: 
0.0
Type Locality: 
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

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