Assertion: pyrite | /r/HasProperty | hard
Facets:
value: fairly
type: DEGREE
value: for most jewelry use
type: OTHER
Source sentences:
text: Pyrite is hard and durable enough for most jewelry use, but rainbow pyrite is slightly delicate owing to its encrusted formation.
text: But even though Pyrite is a fairly hard mineral, its crystals are known to break and crumble, as it is brittle.
text: With a hardness of 6 to 6.5 on the Mohs scale, pyrite is hard enough to be used in jewelry.
text: Pyrite is hard enough that it cannot be scratched with a nail, but chalcopyrite is easily scratched with a nail.