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Sturmanite

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Sturmanite

Rare Mineral

Description Tabs

Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.5 × 1.3 cm
Largest Crystal: 
0.50cm
Weight: 
62.00gr
Description

Some really fine and aesthetic dozens of lustrous sturmanite crystals on matrix. Sturmanites are classic from this locality in the Kalahari Manganese Fields.

Mineral Data
What's on the rock

Sturmanite

Formula: 
Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12·25H2O
Strunz: 
7.DG.15
Crystal System: 
Trigonal
Hardness: 
2.5
Type Locality: 
Black Rock Mine, Black Rock, Kalahari manganese field, Northern Cape Province, South Africa

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Start 14 May 18:00
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$24.99