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Spessartine & Schorl On Feldspar

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SHS1163080

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Description
Locality: 
Korgal Pegmatite, Nuristan Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 11 × 10 cm
Description

Spessartine crystals and black schorl crystals on matrix

Mineral Data
What's on the rock

Spessartine

Formula: 
Mn2+3Al2(SiO4)3
Strunz: 
9.AD.25
Crystal System: 
Isometric
Hardness: 
6.5 - 7.5
Streak: 
White
Type Locality: 
Sommer quarry, Wendelberg, Haibach, Aschaffenburg, Spessart, Franconia, Bavaria, Germany

Schorl

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

Feldspar

Group Parent: 
Feldspar Group

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Start 25 Jan 18:00
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