Assertion: engagement ring's diamond | /r/HasProperty | a 10
Facets:
Source sentences:
text: On a more technical note, these durable stones appeal to jewelers because they have a hardness of nine on the Mohs scale (diamonds are a 10).
text: Diamonds are a 10 on the Mohs’ scale, making them one of the hardest and most durable choices,” says Bodoh.