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 Home / Gem Library / Natural Gemstones / Kyanite October 20, 2019  

Natural Kyanite
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There are 6 Kyanite(s) available at

Kyanite is a mineral infrequently cut as a gemstone. It occurs in light to dark blue, green, colorless and brown colors in a transparent form with the blue color being most used in gemstones. Kyanite is of interest because of the extreme variablity in hardness with direction. In one direction, the hardness is 4.5 and in the other it is 7. Very easy cleavage is encountered in one direction with a less perfect cleavage occurring at 74 degrees to the first. The finest gem quality Kyanite may be confused in appearance with spinel or blue sapphires from Burma.

Known Facts
Color Key: Blue, Greenish Blue.
Refractive Index: 1.716 1.731
Chemical Composition: AL2SIO5
Hardness: 4.5 7.0
Density: 3.56 3.68
Crystal Group: Triclinic
Ocurrence: Kenya, Nepal, India, Burma,U.S.A.

Check our Top, Largest, Smallest or Latest Kyanite's.

Kyanite Stats/
Popularity Index: 261522hits
Total Items: 6items
Total Weight: CTS 20.26
Cheapest: USD 44.40
Most Expensive: USD 122.40
Largest: CTS 4.73
Smallest: CTS 1.85
Last Added: 03/29/16 10:31:30

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