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Thaumasite

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PDM571042

Thaumasite

Gem Crystal

Description Tabs

Description
Locality: 
NChwaning Mines, Kuruman, Northern Cape Province, South Africa
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 0.6 × 0.6 cm
Description

Transparent and bright crystal of thaumasite formed by the hexagonal prism and the flat pinacoid, both bevelled by an incipient hexagonal bipyramid. The crystal is so clean inside that it allow us to see the nice phantoms that appear internally if the crystal is backlighted. A quality crystal for the species and completely undamaged, without chippings.

Ex Gerard Vogel (NL), it was acquired from Willy Israel (BE) in 1985.

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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