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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/
Sapphire Single
From our finest gemstones collection
Sapphire Single Octagon Eye clean
Size: 11.80 X 8.20 MM
Weight: 6.300 CTS
Shape: Octagon
Clarity: Eye clean
Usually ships within 24 hours
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USD 11340.00
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Deal of the Day/
Danburite Single
limited time offer, ref# YDN105ab
Danburite Single Oval Slightly included
Size: 19.60 X 15.20 MM
Weight: 19.780 CTS
Shape: Oval
Clarity: Slightly included
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10 % OFF, YOU SAVE 39.56 USD
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USD 356.04
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Today’s Trade/
Best Selling Gems:
Sapphire Sapphire
1646 Sapphire ’s available
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Spinel Spinel
435 Spinel ’s available
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Alexandrite Alexandrite
287 Alexandrite ’s available
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Tanzanite Tanzanite
454 Tanzanite ’s available
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Zircon Zircon
237 Zircon ’s available
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Gemstone Variety: Hits Index
Going Down Amber -79478 -1.7%
average price USD 183.13 per item
Going Down Sapphire -6549 -0.2%
average price USD 393.48 per item
Going Down Alexandrite -1628 -0.2%
average price USD 2091.34 per item
Going Up Parisite +83364 +13.7%
average price USD 122.67 per item
Going Down Turquoise -222 +-0.0%
average price USD 57.70 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Citrine, Topaz
More from the Gem Library about Birthstones.
Scorpio Scorpio
October 23 – November 21
Fixed Sign. Scorpio is imaginative and emotional. Your zodiac stone...more

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