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Kyanite & Staurolite

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WND804016

Kyanite & Staurolite

Classic Locality

Description Tabs

Description
Locality: 
Sponda Alp-Pizzo Forno, Chironico Valley, Leventina, Ticino, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 4.4 × 2 cm
Description

Medium blue, transparent and elongated crystals of kyanite accompanied by deep brown staurolite. The prism faces of both species are well developed, but they are, typical for this locale, unterminated. They are sharp edged and lustrous as well. A good specimen.

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
Wendel Minerals

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