Carbon Low-grade diamond
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3D3DLow-grade diamond.
This is a low-grade 2.71ct natural diamond. It's quite large as diamonds go, but only semi-transparent and therefore worth astronomically less than you might think: Only about $100. It's also no longer of this world, because I burned it up during shooting for my Popular Science article about how to burn up diamonds.
Source: eBay seller emerald-imports
Contributor: Theodore Gray
Acquired: 28 June, 2009
Text Updated: 29 June, 2009
Price: $100
Size: 0.25"
Purity: >98%
Carbon