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Halloysite & Allophane

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JYJ108526

Halloysite & Allophane

Description Tabs

Description
Locality: 
Cape Calamita Mine, Capoliveri, Elba, Livorno Province, Tuscany, Italy
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 1.2 cm
Description

This specimen shows halloyisite and waterblue coloured allophane.

Mineral Data
What's on the rock

Halloysite

Group Parent: 
Kaolinite-Serpentine Group

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