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The cost of a green, emerald-like Russian demantoid garnet depends on the clarity, quality, size and cut of the gem. Russian demantoid garnets with a highly-desirable "horsetail"--a radiating spiral of needle-like fibers--can cost $1000 per carat. Other demantoid garnets vary in price from $15 to $500, as of 2009.
Source:
Gehna Bazaar: Demantoid Garnet Gemstone
Resource:
Palagems: The Reds Have the Greens
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