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Demantoid Garnet is known as "the queen of the garnet family". Though demantoid garnet has been found in Africa in very limited quantities, the best demantoid is found in the Ural Mountains of Russia and is associated with gold bearing sands. The Russian demantoid garnet has much richer and vibrant color. The combination of its color and fire give it unsurpassed splendor. As well, most Russian demantoid garnet is also characterized by "horsetail" inclusions - minute asbestos fibres oftentimes only visible under a microscope. Demantoid garnet is generally available on in small sizes. Gemstone quality specimens in excess of one carat are very rare. Mining of this beautiful, brilliant green garnet lasted only about 30 years, ending before the turn of the twentieth century (over 100 years ago). The primary source for top quality stones today is antique jewelry.
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Demantoid was very popular in the 19th century, and remains one of the most valuable gemstones of all, highly coveted for its rarity and its incredible brilliance. Demantoid has a relatively high refraction of light (1.888). Remarkable, however, is also the dispersion, i.e., its ability to reflect the light coming in through the facets and to dissemble this light into all the colours of the rainbow. Demantoid is a champion in this respect, even better than diamond. When the Demantoid was first discovered in the Urals mountains in Russia in 1868, it quickly advanced to the position of a much coveted gemstone. Like a comet it sparkled and shone, displaying its fire at jewellers' studios in Paris, New York and St Petersburg. Carl Faberge, Russia's renown royal jeweler, was fascinated by it because of its striking brilliance, and so he loved to use the stone in his precious objects.
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