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Rare 2.86Ct Vivid Medium Blue Colour Afganite with Strong High Fluorescence
- SKU
- Dimensions (mm)
- 14.300 x 7.500 x 5.200mm
- Weight (cts)
- 2.860
- Treatment
- No Treatment
- Shape
- Pear
- Type
- Faceted
- Clarity
- VS
- Colours
-
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.
- SKU
- Dimensions (mm)
- 14.300 x 7.500 x 5.200 mm
- Weight (cts)
- 2.860
- Treatment
- No Treatment
- Shape
- Pear
- Type
- Faceted
- Clarity
- VS
- Colours
-
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.
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Rest of the world
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| Express Shipping | $35.00 / 10 days | $60.00 / 7 days |
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Rest of the world
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PositiveVery nice stone.
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Positive
Gorgeous gem and lovely vendor
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Positive
Very nice stone.
Reserve not met
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Description Accurate
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Comments
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