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Bementite & Andradite With Hematite & Gaudefroyite

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SMS1152902

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.9 × 4.3 × 3 cm
Weight: 
44.75gr
Description

The specimen has bementite with andradite and hematite with gaudefroyite. One large crystal of hematite lies laterally across the upper face. The specimen predominantly features the hematite. The gaudefroyite is absorbed into the surface spread of hematite.

Mineral Data
What's on the rock

Bementite

Formula: 
Mn7Si6O15(OH)8
Strunz: 
9.EE.05
Crystal System: 
Monoclinic
Hardness: 
6.0
Streak: 
White
Type Locality: 
Trotter Mine (Lehigh Mine), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA

Andradite

Formula: 
Ca3Fe3+2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Drammen, Buskerud, Norway

Hematite

Formula: 
Fe2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0

Gaudefroyite

Formula: 
Ca4Mn3+2-3(BO3)3(CO3)(O,OH)3
Strunz: 
6.AB.60
Hardness: 
6.0
Type Locality: 
Tachgagalt Mine, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco

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Start 27 Nov 18:00
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Shipping Information

Postage Area Price
Europe up to 500 grams
$12
Europe up to 1 kilogram
$16
United States up to 500 grams
$14
United States up to 1 kilogram
$18
Rest of world up to 500 grams
$14
Rest of world up to 1 kilogram
$18

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