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Brucite Over Sturmanite

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SMS1077334

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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 × 3.6 × 1.9 cm
Weight: 
13.17gr
Description

The specimen has a beige coloured brucite with yellow sturmanite. The crystal finish and form is foliated domes of pearlescent brucite. The sturmanite is nestled into a shallow shelf on the matrix base.

Mineral Data
What's on the rock

Brucite

Formula: 
Mg(OH)2
Strunz: 
4.FE.05
Crystal System: 
Hexagonal
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Castle Point, Hoboken, Hudson Co., New Jersey, USA

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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Postage Area Price
Europe up to 500 grams
$12
Europe up to 1 kilogram
$16
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$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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Combined Shipping: We do offer combined shipping. The cost is $4 added to the shipping cost per additional 500 grams. Please note that the packaging weight also needs to be taken into account. The average packaging weight is 150 grams to 300 grams for larger parcels.

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