Provenance Of Gold Hardness

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The most commonly used test of mineral hardness is Mohs Hardness Scale.

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A German mineralogist by the name of Friedrich Mohs invented a scale of relative mineral hardness that has become known as the Mohs scale.

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Mohs Scale of Hardness - Mineralogical Society of America

The Mohs' hardness scale was developed in 1822 by Frederich Mohs. This scale is a chart of relative hardness of the various minerals (1 - softest to 10 - hardest).

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