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Katoite & Afwillite

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CAM89215

Katoite & Afwillite

Rare Mineral

Description Tabs

Description
Locality: 
Caspar Quarry, Bellerberg, Ettringen, Eifel, Mayen-Koblenz, Rhineland-Palatinate, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1 × 0.7 cm
Description

A very fine example of the rare silicate katoite as clear globules grown on magnetite.

Associated with colourless tabular afwillite crystals.

Mineral Data
What's on the rock

Katoite

Formula: 
Ca3Al2(SiO4)3-x(OH)4x
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
5.0 - 6.0
Streak: 
White
Type Locality: 
Campomorto Quarry, Pietra Massa Locality, Montalto di Castro, Viterbo Province, Latium, Italy

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
Cartils Minerals

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