Assertion: alexandrite | /r/HasAspect | a hardness of 8.5
Facets:
value: on the mohs scale
type: OTHER
Source sentences:
text: Chrysoberyl and alexandrite both have a hardness of 8.5 on the Moh's scale, so are only just softer than sapphires, and because of this, weathered crystals are often found in deposits in streams and gravel beds.
text: Alexandrite has a hardness of 8.5 on the Mohs scale.