Assertion: chalcedony | /r/HasProperty | hardness 7
Facets:
value: on softer
type: OTHER
value: like quartz
type: OTHER
value: on the mohs scale
type: OTHER
Source sentences:
text: Unlike quartz, chalcedony does not look clear and glassy but translucent and waxy; like quartz it is hardness 7 on the Mohs scale or just a little softer.