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Brucite & Ettringite

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RAF716568

Brucite & Ettringite

Description Tabs

Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.6 × 7.8 × 3.6 cm
Largest Crystal: 
0.80cm
Weight: 
317.00gr
Description

A fine specimen with Brucite and Ettringite crystals on a Brucite matrix, it is very rare to get Brucite crystals like this. a very nice piece.

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

Ettringite

Formula: 
Ca6Al2(SO4)3(OH)12·26H2O
Strunz: 
7.DG.15
Hardness: 
2.0 - 2.5
Type Locality: 
Ettringer Feld, Western lava flow, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany