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Afwillite

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SKI638930

Afwillite

Rare Mineral

Description Tabs

Description
Locality: 
Zeilberg Quarry, Maroldsweisach, Bavaria, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 6.5 × 3.5 cm
Largest Crystal: 
0.40cm
Description

An example of prismatic white afwillite from Zeilberg basalt quarry. The matrix consists of a contact-metamorphic sandstone.

Mineral Data
What's on the rock

Afwillite

Formula: 
Ca3(HSiO4)2·2H2O
Strunz: 
9.AG.75
Crystal System: 
Monoclinic:
Hardness: 
3.0 - 4.0
Streak: 
White
Type Locality: 
Dutoitspan Mine, Kimberley, Francis Baard District, Northern Cape Province, South Africa

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