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About To Know The Stone Is Stone Creser In Bisness

Jul 01, 2014 Some stones are physically harder than others, and hardness is usually measured by the Mohs' Scale. Use the various substances provided in a hardness kit to scratch the surface of the gemstone. If the stone can be scratched, it is softer than the substance you scratched it with. If the stone cannot be scratched, it is harder than the substance.

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