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Allophane

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CLB208408

Allophane

Description Tabs

Description
Locality: 
Victor Mine, Eisenberg, Goldhausen, Korbach, Waldeck-Frankenberg, Hesse, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 5 × 2.7 cm
Description

Nice specimen with pale blue to turquoise-colored allophane on dark gray matrix.

Mineral Data
What's on the rock

Allophane

Formula: 
(Al2O3)(SiO2)1.3-2·2.5-3H2O
Strunz: 
9.ED.20
Crystal System: 
Amorphous
Hardness: 
3.0
Streak: 
White
Type Locality: 
Gräfenthal, Thuringian Forest, Thuringia, Germany

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