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Allophane

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TPX704265

Allophane

Rare Mineral

Description Tabs

Description
Locality: 
Cala Mines, Cala, Huelva, Andalusia, Spain
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 4.7 × 2.7 cm
Weight: 
67.00gr
Description

Very nice electric blue globular allophane from this new find.

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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