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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.
| Shipping provider | Shipping to Thailand | Shipping to rest of world |
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| Standard Shipping - Tracked | $10.00 / 7 days | $15.00 / 21 days |
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| FedEx | $35.00 / 2 days | $35.00 / 4 days |
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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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PositiveThe actual stone colour is very different from that pictured. However, it is still a beautiful gem.
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Positive
Nice stone, thank you!
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Positive
Stone is beautiful! Great color and cut!
Reserve not met
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Audit
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Description Accurate
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Pictures Accurate
Comments
The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.
