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Mineralpedia Details for Kyanite

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Kyanite

Kyanite

Formula
Al2OSiO4 
Crystal System
Triclinic 
Crystal Habit
Columnar, Fibrous 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Pearly 
Color
blue, white, gray, green, black 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
4-7 
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Kyanite from Pizzo Forno, Chironico Valley, Leventina, Ticino, Switzerland

Kyanite
            from Pizzo Forno, Chironico Valley, Leventina, Ticino, Switzerland

Blue bladed Kyanite crystals with Schorl.

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Kyanite from Kola Peninsula, Russia

Kyanite
            from Kola Peninsula, Russia

Deep blue Kyanite blades to 3cm in green Fuchsite.

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Kyanite from Cobble Mt. Reservoir, Blanford, Maryland, United States

Kyanite
            from Cobble Mt. Reservoir, Blanford, Maryland, United States

Long bluish green Kyanite blades to 8cm.

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Kyanite from Marilac, Minas Gerais, Brazil

Kyanite
            from Marilac, Minas Gerais, Brazil

For black Kyanite - not bad. This one kind of reminds me of a "comb-over".

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Kyanite from Bahia, Brazil

Kyanite
            from Bahia, Brazil

Blue bladed and platy crystals of Kyanite to 7cm.

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Kyanite from Barra do Salinas, Coronel Murta, Minas Gerais, Brazil

Kyanite
            from Barra do Salinas, Coronel Murta, Minas Gerais, Brazil

Deep blue blades of Kyanite to 7cm. Note the darkest blue color is a band through the center, typical for Kyanite.

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Kyanite from Mautia Hill, Central prov., Dodoma, Tanzania

Kyanite
            from Mautia Hill, Central prov., Dodoma, Tanzania

Unusual green bladed Kyanite.

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Kyanite from Cullen, Charlotte Co., Virginia, United States

Kyanite
            from Cullen, Charlotte Co., Virginia, United States

Blue divergent crystals of Kyanite to 3.5cm in Quartz matrix.

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Kyanite from Sponda Alp, Chironico Valley, Leventina, Ticino, Switzerland

Kyanite
            from Sponda Alp, Chironico Valley, Leventina, Ticino, Switzerland

Large cabinet specimen of blue Kyanite blades to 8cm long in Pyrophyllite (?) matrix or "mica schist". This is a classic well-know locality which is often featured in many older mineral/geology picture books.

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