Diamond, the invincible stone

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.