Assertion: spodumene | /r/HasAspect | good hardness
Facets:
value: relatively
type: DEGREE
value: on the mohs scale
type: OTHER
Source sentences:
text: Even though spodumene has relatively good hardness (6.5 to 7.5 on the Mohs scale), an attractive luster and excellent transparency, it is still mostly unknown to many gemstone buyers.