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Allophane

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TPX536493

Allophane

New Discovery

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Description
Locality: 
Cala Mines, Cala, Huelva, Andalusia, Spain
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.6 × 2 cm
Weight: 
6.00gr
Description

Very nice sample of blue allophane from a new discovery in this closed Spanish mine.

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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