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Allophane

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TPX551785

Allophane

New Discovery

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Description
Locality: 
Cala Mines, Cala, Huelva, Andalusia, Spain
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.7 × 3.4 cm
Weight: 
37.00gr
Description

Very nice sample of electric blue allophane on limonite matrix from this new discovery

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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