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150 grams Kyanite specimen parcel RB43

150 grams Kyanite specimen parcel RB43

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Colors
Certified Gemstone
KYANITE SPECIMENS
PARCEL AS PER IMAGE
LARGETS PIECE  62 x 16 x 11  MM
SOURCE FROM BRAZIL
 
 
 
Kyanite is a polymorph with two other minerals; andalusite and sillimanite. A polymorph is a mineral that shares the same chemistry but a different crystal structure with another, or other, minerals. Kyanite is an attractive mineral that has a near sapphire like blue color in some especially nice specimens. Kyanite has a unique characteristic in that it has a wide variation in hardness, in the same crystal. The hardness of kyanite is approximately 4.5 when scratched parallel to the long axis of the crystal and approximately 6.5 when scratched perpendicular to or across the long axis. Other minerals usually have variable hardness on different crystal faces due to a different concentration and oreintation of the atoms in the structure
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$29.00 USD

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Pricing & Details

Auction ID 404020
Watchers 2 watching
Viewed 1,441 times
Starts 12th Feb 2014 2:24pm PST

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