In ancient Grece, diamond hardness gave him its name, coming from the ancient Greek αδάμας – adámas, meaning “unbreakable”.
Diamond is the hardest known natural material on the Mohs scale of mineral hardness, where hardness is defined as resistance to scratching and is graded between 1 (softest) and 10 (hardest). Diamond has a hardness of 10 (hardest) on this scale.
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