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I've had this little guy for a while now and have been trying to identify it for some time with no luck. It looks like its oxidized with tiny little crystals, but it's hard to tell for sure. Picture

Any help is appreciated!

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    $\begingroup$ Welcome to earthscience.SE. Take a look at this guide for information on how to ask rock identification questions. We could really benefit from some more information here. $\endgroup$ – bon Feb 13 '17 at 18:05
  • $\begingroup$ Silicon carbide. Excellent scratching material. Note that it's not oxidised, there is no oxygen in SiC. $\endgroup$ – Gimelist Feb 14 '17 at 0:02
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I believe it is Silicon carbide / Carborundum crystals, a man made abrasive. A photo from my collection. Silicon carbide

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  • $\begingroup$ Awesome, thank you! That's exactly what it is! $\endgroup$ – user9911 Feb 13 '17 at 20:08

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