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Demesmaekerite

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SMM804759

Demesmaekerite

Rare Mineral
Type Locality

Description Tabs

Description
Locality: 
Musonoi Mine, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.5 × 3 cm
Description

Beautiful dark-green, glassy, bundle of sharp crystals, of rare demesmaekerite. With this color, the unaltered crystals of this beautiful uranyl-selenite are rarely shown, more frequently they are pale olive green and opaque like those close to this beautiful group.

Excellent specimen! 

Additional information: Nice clusters of pale yellow prismatic crystals of barite and bright yellow spots attributable to guilleminite are visible on the sample.

 

Boxed with Label
Mineral Data
What's on the rock

Demesmaekerite

Formula: 
Pb2Cu5(UO2)2(SeO3)6(OH)6·2H2O
Strunz: 
4.JJ.20
Crystal System: 
Triclinic
Hardness: 
3.0 - 4.0
Type Locality: 
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

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