Assertion: silicon carbide's hardness | /r/HasProperty | hard material
Facets:
value: very
type: DEGREE
Source sentences:
text: On the Mohs’ hardness scale, where diamonds represent the upper limit with a hardness of 10 and all minerals are considered very hard with hardness values greater than 6, SiC is among the top scorers with a hardness of 9 which is considered a very hard material.