Onyx Rough from Arizona - $8.00/lb

Onyx is a gemstone that’s especially known for its opaque, all-black variety. Other varieties are black with with different-colored layers, including white. Onyx is a relatively soft stone with a hardness of around 6.5 to 7 on the Mohs scale and makes beautiful cabochons.
Cab338 - Onyx Cabochon
Example of an Arizona Onyx Cabochon.

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