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Fluorite & Muscovite On Schorl

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CR107680

Fluorite & Muscovite On Schorl

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 6.8 × 6 cm
Description

Pearlescent, pastel-yellow muscovite crystals nearly encapsulate a lustrous schorl crystal. Gemmy, olive-green fluorite cubes are also nearly covered up and add much character to this uncommon and very fine combination piece.

Mineral Data
What's on the rock

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

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0