2.10 Carat Extremely Rarest Blue Motif Color Afghanite Gemstone From Afghan

Item Information

Dimensions (mm) 9 x 7 x 5mm
Weight (carats) 2.1 carats
Colors
No Treatment

Afghanite, (Na,K)22Ca10[Si24Al24O96](SO4)6Cl6,[1] is a hydrous sodium, calcium, potassium, sulfate, chloride, carbonate alumino-silicate mineral. Afghanite is a feldspathoid of the cancrinite group and typically occurs with sodalite group minerals. It forms blue to colorless, typically massive crystals in the trigonal crystal system. The lowering of the symmetry from typical (for cancrinite group) hexagonal one is due to ordering of Si and Al.[1]  It has a Mohs hardness of 5.5 to 6 and a specific gravity of 2.55 to 2.65. It has refractive index values of nω=1.523 and nε=1.529. It has one direction of perfect cleavage and exhibits conchoidal fracture.[3]  It fluoresces a bright orange.

Natural Gemstone

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Pricing & Details

Auction ID 1072339
Watchers 1 watching
Viewed 226 times
Starts 3rd Dec 2019 5:59am PST

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