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Olmiite & Bultfonteinite

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CLB139863

Olmiite & Bultfonteinite

Type Locality

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 8 × 6 cm
Description

Very rich, absolutely beautiful specimen, covered almost completely with brownish olmiite crystals(formerly regarded as poldervaartite) and silky white bultfonteinite needles. One side coated with haematite micro crystals. Type locality of Olmiite.

Mineral Data
What's on the rock

Olmiite

Formula: 
CaMn2+[SiO3(OH)](OH)
Strunz: 
9.AF.90
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
N'Chwaning II Mine, N'Chwaning Mines, Kuruman, 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

Seller Information

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