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how can I identify real onyx bead from a black glass bead?

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asked Feb 24, 2016 by pollyherrera (120 points)

1 Answer

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Onyx is very hard. It will probably scratch glass.
answered Feb 27, 2016 by Weasel (38,360 points)
Correct. Onyx is a type of chalcedony, with a hardness of 7. Glass has a hardness of 5.5.

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