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Ettringite

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TPX622637

Ettringite

Rare Mineral

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.7 × 5.2 × 3.7 cm
Largest Crystal: 
1.20cm
Weight: 
300.00gr
Description

Spectacular and very esthetic group of ettringite crystals of lemon yellow color on matrix, nowadays it is very rare to find ettringite specimens with crystals of this size. This piece comes from an old collection and was found in the 1980s

Mineral Data
What's on the rock

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

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