Assertion: blue topaz | /r/HasProperty | unusual
Facets:
value: in offering excellent hardness
type: OTHER
Source sentences:
text: Blue topaz is unusual in offering excellent hardness (8 on the Mohs scale) and brilliance at a very reasonable cost.
text: Blue topaz is unusual in offering excellent hardness (8 on the Mohs scale) and brilliance at a very reasonable cost.