Hardness
硬度／コウド
硬度
Hardness
Dureté
Glossary
Thematic
Jewellery, Technic
The resistance of a material to scratching and wear. Hardness is measured using the Moh's Scale. This scale indicates that one substance can scratch the substance below it and scratch itself. For example, a diamond (10) will scratch ruby (9) and its self, but not the other way around, so a diamond is harder.