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Spessartine Glaucophane & Kyanite

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CLB187322

Spessartine Glaucophane & Kyanite

Description Tabs

Description
Locality: 
Bagnes, Entremont, Valais, Switzerland, Valais, Switzerland
Class: 
Massive/Crystalline
Size Range: 
Museum (18cm plus)
Size: 
19.2 × 16.3 × 2.5 cm
Description

Brown spessartine crystals with graish-blue glaucophane and greenish kyanite (not analyzed). An interesting and decorative cut and polished endpiece of a large boulder.

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

Glaucophane

Formula: 
◻[Na2][Mg3Al2]Si8O22(OH)2
Strunz: 
9.DE.25
Hardness: 
5.0 - 6.0
Type Locality: 
Syros Island (Syra), Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon), Kykládes Prefecture, Aegean Islands Department (Aiyaíon), Greece

Kyanite

Formula: 
Al2(SiO4)O
Strunz: 
9.AF.15
Crystal System: 
Triclinic Forms long bladed crystals.
Hardness: 
5.5 - 7.0
Streak: 
Colorless

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