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can you help me identify these stones? i have other (maybe precious) stones as well

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asked Mar 5, 2018 by lpchuvy (210 points)

1 Answer

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The black stone looks like obsidian or a piece of slag or a schorl.better check the specific gravity.if its a carbonado (black diamond) the hardness would be 10 on moh scale and a low specific gravity could be be from 3.10 to 3.50 due to its porous nature.
answered Mar 7, 2018 by Pride (1,110 points)