39.65 CTS KYANITE STONE -BRAZIL [MGW669]

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Colors
Certified Gemstone

MINERAL GEM WORLD

KYANITE STONE

Rectangle shaped

This is a natural stone Kyanite mined in Brazil.

Size 41 x 15 x 4 mm app

Weight 39.65 cts app

Slightly transparant.


The most highly prized kyanite is the vibrant blue or blue-green hue. It is also found in shades of gray, yellow, white and a colorless variety that is considered quite rare.

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

6h 44m 0s

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Pricing & Details

Bid Increment $1.00
Starting Bid $18.00
Auction ID 259228
Watchers 4 watching
Viewed 565 times
Starts 6th Dec 2016 9:02pm PST
Ends 7th Dec 2016 9:00pm PST

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