Kyanite
Minerals

Kyanite

Kyanite is a nesosilicate and it is a common metamorphic silicate mineral.
Formula: Al2(SiO4)O

Colour: Blue, white, light gray, green, rarely yellow, orange, pink
Hardness: 5.5-7
Specific Gravity: 3.53 - 3.67
Crystal System: Triclinic



Physical Properties
Luster: Vitreous, Sub-Vitreous, Greasy, Pearly

Transparency:Transparent, Translucent
Streak:Colorless
Tenacity:Brittle
Cleavage:Perfect on Perfect on (100), good on (010)
Fracture: Splintery


Locality from Museum Sample
Hamedan-Iran, Birjand-Iran, Tunga-India, Kenya, Brasilia 
Application
Kyanite is used as an industrial raw material for the manufacture of thermal and acid refractories used in ceramics, precision castings, refractory additives and fillers. It is also used in the ferrous and non-ferrous casting industries.



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