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Kyanite Staurolite & Paragonite

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RSL1083505

Description Tabs

Description
Locality: 
Sponda Alp-Pizzo Forno, Chironico Valley, Leventina, Ticino, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 6 × 3 cm
Largest Crystal: 
5.00cm
Description

Group of kyanite crystals, of gem quality, with transparency and when light passes through them they offer an exceptional color. They are accompanied on the matrix by brown staurolite crystals and paragonite (Na mica). They stand out on a clear schistose matrix. A quality European piece that is difficult to see today. Classic and aesthetic material from this famous Swiss locality from the E. Nicolau collection (Barcelona).

Mineral Data
What's on the rock

Kyanite

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

Staurolite

Formula: 
Fe2+2Al9O6(SiO4)4(O,OH)2
Strunz: 
9.AF.30
Crystal System: 
‎Monoclinic
Hardness: 
7.0 - 7.5
Colour: 
Brown

Paragonite

Formula: 
NaAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Crystal System: 
Monoclinic
Hardness: 
2.5
Type Locality: 
Sponda Alp - Pizzo Forno, Chironico Valley, Leventina, Ticino (Tessin), Switzerland

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100
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