Assertion: moonstone | /r/CapableOf | feature a 6 - 6.5 grade
Facets:
value: on the mohs scale of hardness
type: OTHER
Source sentences:
text: Featuring a 6 - 6.5 grade on the Mohs scale of hardness, moonstone is defined as a relatively soft stone and this makes it easier for jewelry designers to experiment with the shapes and looks in their collections.