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Scarbroite & Allophane

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SKY578421

Scarbroite & Allophane

Rare Mineral

Description Tabs

Description
Locality: 
Magaña, Soria, Castile & León, Spain
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 2 × 1.5 cm
Description

White aggregates of the rare mineral scarbroite associated to sky blue allophane, from a little known Spanish locality. Scarbroite has only been found in 9 localities worldwide.

Mineral Data
What's on the rock

Scarbroite

Formula: 
Al5(CO3)(OH)13·5H2O
Strunz: 
5.DA.35
Crystal System: 
Monoclinic
Hardness: 
0.0
Colour: 
White
Type Locality: 
South Bay, Scarborough, North Yorkshire, England, UK

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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