150 grams Kyanite specimen parcel RB44

4404

UGS
Dimensions (mm): x x mm
Poids (cts)
Certified Gemstones: Non
Taper: Specimen
Couleurs

KYANITE SPECIMENS

PARCEL AS PER IMAGE

LARGETS PIECE 54 x 13 x 12 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

UGS
Dimensions (mm): x x mm
Poids (cts)
Certified Gemstones: Non
Taper: Specimen
Couleurs

KYANITE SPECIMENS

PARCEL AS PER IMAGE

LARGETS PIECE 54 x 13 x 12 MM

SOURCE FROM BRAZIL

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