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Home / Gem Library / Gemstones Varieties / Kyanite November 15, 2019

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.

  • There are 6 Kyanite gemstones available at
  • Kyanite(s) are organized in the following categories: Single,  gemstones.
  • Our most expensive Kyanite is USD 122.40 and largest Kyanite weight is CTS 4.73.
  • Our cheapest Kyanite is USD 44.40 and smallest Kyanite weight is CTS 1.85.

Find your Kyanite

Our Kyanite(s) are available in various shapes, sizes and colors. 6 Kyanite(s), too many to look through? You may select any combination of search options. Colors grade into each other and you can search for more than one color at once. For a better selection, try selecting two or three colors, -- your first choice plus the two closest colors.

Color range
bluish violet
violetish blue

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

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Kyanite range/
Kyanite Single
Kyanite Single Oval Moderately included
Size: 11.00 X 7.90 MM
Weight: 4.080 CTS
Shape: Oval
Clarity: Moderately included
Usually ships within 24 hours
USD 122.40
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Kyanite Single
Kyanite Single Oval Moderately included
Size: 8.80 X 6.50 MM
Weight: 1.850 CTS
Shape: Oval
Clarity: Moderately included
Usually ships within 24 hours
USD 44.40
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Gem Library/
Gems Legend and  Lore Gems Legend and Lore
Some of the latest of ways that gems have been associated with Birthstones and Signs of the Zodiac.
Understanding Gemstones Understanding Gemstones
Learn about Physical and Optical properties, color, clarity and cut of gemstones.
Gems Glossary Gems Glossary
Ever wonder what are "Blemish", "Luster", "Saturation" "Uniformity" or "Mine Run" means?
Reference and  Links Reference and Links
Recommended books and links to Gem, Jewelry&Mineral Magazines, Gem Institutes and Labs.

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