Black Diamonds - questions !

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Yes, no, not really. VERY few high quality totally natural ones are going to be on the same cost/value scale as a white diamond. With marketing being what it is, that is driving up the price at retail, but it's kind of artificial.
 
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I believe most are not naturally black, but have been irradiated to become black. JTV has a bunch of them for sale.

If it's just the look you want, consider black spinel (JTV also has a lot). It's not treated, and even shinier than the black diamonds.
 
If they're larger than like...melee...theyre really more of a polycrystalline structure (a bunch of little ones). But most of what is on the market IS treated.
 
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