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Thaumasite

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PDM762432

Thaumasite

Gem Crystal

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 0.8 × 0.7 cm
Description

Transparent and bright thaumasite crystal of formed by the hexagonal prism and the flat pinacoid. The size is good for the species. A quality crystal for the species and locality, without chippings.

Acquired in 1986. Ex. Jan Soudan specimen.

Mineral Data
What's on the rock

Thaumasite

Formula: 
Ca3(SO4)[Si(OH)6](CO3)·12H2O
Strunz: 
7.DG.15
Hardness: 
3.5
Streak: 
White
Type Locality: 
Bjelke Mines, Åreskutan, Åre, Jämtland, Sweden

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