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This auction has been won.
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Leading
twinkstpl8 1 × R151.00
27 Jan 13:52
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Mohammed Osman123 1 × R101.00
26 Jan 19:39
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0.46ct BEAUTIFUL MULTI-COLOUR TANZANITE
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0.46ct BEAUTIFUL MULTI-COLOUR TANZANITE

New 1 was available
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R151.00
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Product details

Condition
New
Location
South Africa
Bob Shop ID
18780350

0.46ct Multi-Colour Tanzanite

Item100% NATURAL Tanzanite
Weight0.46ct
ColourMulti Colour - Blue Green & Voilet
ShapeAntique/ Portugese cut
LUSTREStunning
ClarityVVS
Dimensions

5.1 x 4.2 x 2.5mm

Treatment

Gentle Heat

Origin : Tanzania

   

Tanzanite, a variety of zoisite, was discovered in the Merelani district of Tanzania near Mount Kilimanjaro in 1967. So far, all tanzanite discovery has been limited to a six kilometer strip in this area, which was divided into four blocks, labeled A, B, C and D. Block C is the only site still commercially producing rough tanzanite at this time. Almost all purple and blue varieties of the stone are the result of heat treatment. The stone is a yellowish-brown "bug juice" color when it is mined, but when heated to between 426.7-482.2 degrees Celsius, it becomes that gorgeous violet blue that is used in jewelry. The stone has never been found in another locality, so it is indeed a depleting resource. It is somewhat soft (6-7 on Mohs scale of hardness) and has a direction of cleavage along which it can be easily broken. It is desirable because of its elegant, opulent color.  

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