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Natural Kyanite

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.


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Kyanite Profile

Color information: 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.
Sign of the Zodiac: N/A
Month of the year: N/A
Kyanite

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Ruby Single
From our finest gemstones collection
Ruby Single Oval Eye clean
Size: 9.81 X 7.16 MM
Weight: 3.070 CTS
Shape: Oval
Clarity: Eye clean
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USD 98240.00
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Danburite Single
limited time offer, ref# XDN157bf
Danburite Single Oval Eye clean
Size: 10.80 X 8.80 MM
Weight: 3.880 CTS
Shape: Oval
Clarity: Eye clean
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USD 59.36
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Gemstone Variety: Hits Index
Going Down Amber -6604 -0.1%
average price USD 189.30 per item
Going Up Sapphire +4351 +0.1%
average price USD 399.81 per item
Going Up Parisite +6251 +0.7%
average price USD 122.67 per item
Going Down Alexandrite -49 +-0.0%
average price USD 2010.83 per item
Going Up Anatase +1357 +0.2%
average price USD 221.50 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Alexandrite, Pearl
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Dual nature. You can go in many directions. Your zodiac stone...more

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