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Cassiterite Fluorite Muscovite

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SCH45141

Cassiterite Fluorite Muscovite

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Description
Locality: 
Osa Quarry, Valle de la Serena, Badajoz, Extremadura, Spain
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 1.2 × 0.9 cm
Description

A matrix of fluorite accented with silvery muscovite plates host several cassiterite crystals, showing classic twinning, sharp faces and glassy luster. Rare locality, hard to get!

Mineral Data
What's on the rock

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White
schani

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