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Poldervaartite & Bultfonteinite

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ESM800340

Poldervaartite & Bultfonteinite

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.5 × 2.5 cm
Description

Beige colored poldervaartite crystals with white acicular bultfonteinite crystals on matrix

 

Mineral Data
What's on the rock

Poldervaartite

Formula: 
CaCa[SiO3(OH)](OH)
Strunz: 
9.AF.90
Crystal System: 
Orthorhombic
Hardness: 
5.0
Streak: 
white
Type Locality: 
Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese field, Northern Cape Province, South Africa...

Bultfonteinite

Formula: 
Ca2(HSiO4)F·H2O
Strunz: 
9.AG.80
Hardness: 
4.5
Streak: 
white
Type Locality: 
Bultfontein, Lejweleputswa District, Free State Province, South Africa