Assertion: stone's gemstone | /r/CapableOf | understand to include gemstone
Facets:
value: generally
type: DEGREE
Source sentences:
text: Rare or unusual gemstones, generally understood to include those gemstones which occur so infrequently in gem quality that they are scarcely known except to connoisseurs, include andalusite, axinite, cassiterite, clinohumite and red beryl.