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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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Chrome Tourmaline Single
From our finest gemstones collection
Chrome Tourmaline Single Heart Slightly included
Size: 11.79 X 13.90 MM
Weight: 7.980 CTS
Shape: Heart
Clarity: Slightly included
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Danburite Single
limited time offer, ref# YDN110ab
Danburite Single Oval Slightly included
Size: 8.20 X 6.40 MM
Weight: 1.350 CTS
Shape: Oval
Clarity: Slightly included
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Today’s Trade/
Best Selling Gems:
Demantoid Demantoid
5 Demantoid ’s available
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Phenakite Phenakite
1 Phenakite ’s available
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Quartz Quartz
1 Quartz ’s available
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Scapolite Scapolite
23 Scapolite ’s available
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Grossularite Grossularite
5 Grossularite ’s available
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Gemstone Variety: Hits Index
Going Down Tanzanite -197742 -1.6%
average price USD 461.91 per item
Going Down Sapphire -54814 -16.9%
average price USD 399.77 per item
Going Down Amber -61627 -23.2%
average price USD 197.21 per item
Going Down Alexandrite -8950 -6.7%
average price USD 2493.35 per item
Going Down Spinel -6857 -7.7%
average price USD 450.62 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Aquamarine
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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