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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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Finest gems/
Malaia Garnet Single
From our finest gemstones collection
Malaia Garnet Single Cushion Eye clean
Size: 15.60 X 9.40 MM
Weight: 9.980 CTS
Shape: Cushion
Clarity: Eye clean
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USD 2155.68
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Deal of the Day/
Amber Single
limited time offer, ref# YAR137aa
Amber Single Pear Transparent
Size: 16.52 X 9.96 MM
Weight: 2.310 CTS
Shape: Pear
Clarity: Transparent
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USD 144.00
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Today’s Trade/
Best Selling Gems:
Sapphire Sapphire
1696 Sapphire ’s available
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Spinel Spinel
456 Spinel ’s available
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Alexandrite Alexandrite
294 Alexandrite ’s available
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Tanzanite Tanzanite
451 Tanzanite ’s available
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Zircon Zircon
227 Zircon ’s available
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Gemstone Variety: Hits Index
Going Up Amber +84287 +1.4%
average price USD 183.13 per item
Going Down Sapphire -20611 -0.7%
average price USD 401.31 per item
Going Up Parisite +2617 +0.3%
average price USD 122.67 per item
Going Down Anatase -3256 -0.4%
average price USD 221.50 per item
Going Down Alexandrite -4233 -0.5%
average price USD 1956.52 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Diamond
More from the Gem Library about Birthstones.
Aries Aries
March 21 – April 19
Cardinal sign. Born to be a Leader. Your zodiac stone...more

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