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Fabulous stunning "Yellowish Green" displaying the characteristic vivid flash phenomenon with incomparable brilliance and fire. The Demantoid garnet is a master of refraction boasting extremely high refraction (refractive index 1.880 to 1.889) which it does even better than the diamond.
What is Demantoid Garnet and what's it worth for?
Demantoid Garnet is the green gemstone variety of the mineral andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca3Fe2(SiO4)3 with chromium substitution as the cause of the demantoid green color. Ferric iron is the cause of the yellow in the stone.
It has the misnomers olivine,and Uralian emerald. (Reference Wikipedia)
What is Horsetails in Demantoid Garnet and what causes this?
Russian demantoid often contain inclusions of chrysotile, which is a type of asbestos. These fibers radiate out from a very small crystal of chromite.These inclusions are feathery golden threads that tend to curve and resemble the tail of a horse, and are therefore referred to as horsetail inclusions. Some gemstones are more valuable for their inclusions, and 'horsetails' can be regarded as desirable features in demantoid, as they are taken as an indication of prestigious Russian origin, although some demantoids from certain other locations (such as Italy and Iran) may also contain 'horsetails', which are regarded as being characteristic of a serpentinite geographic origin, and, on the other hand, not all Russian demantoids actually contain 'horsetails'. The microstructure of some demantoids is believed to be affected by the presence of 'horsetails' (the 'horsetail' typically originates towards the centre of the nodule, with the fibres branching out and radiating towards the surface), whereas horsetail-free demantoids from other sources frequently display flat crystal faces.(Reference Wikipedia)
Demantoid Garnet Value?
This is very tricky questions. of course if you have one you are lucky to be called a collector of rare gemstone as Demantoid is extremely rare and beautiful personally i line diamond cut round brilliant which is perfect cut for this gemstone.
Price based on alifgems buying and market analysis done in Thailand, Hong Kong Gem show.
Russian Demantid garnet with horsetail inclusions and good clarity.
0.5 to 1 carat = $ 500 to $ 2000 USD
1 to 2.9 carat = $ 2000 to $ 4500 USD
2.9 to 5 carat = $ 3000 to $ 15000 USD
5 to 16 carat = $ 8000 to $ 75000 USD
Nambia and Madagascar Demantid garnet without horsetail inclusions and good clarity.
0.5 to 1 carat = $ 200 to $ 900 USD
1 to 2.9 carat = $ 300 to $ 1500 USD
2.9 to 5 carat = $ 800 to $ 2000 USD
5 to 16 carat = $ 1200 to $ 20000 USD
Largest we have seen 16 plus carat Russian Demantoid Garnet, alifgems is in contact with owner of this magnificent gemstone, we have pics videos, gublin certificate. This should be world's best stone in current time available for sale. if you would like to buy this or any other Demantoid Garnets from Russia Namibia, Madagascar. Do contact us at firstname.lastname@example.org and we will help you get one with great price.
Exclusive Demantoid Garnet & Diamond 18 K WG, Ring
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