Assertion: chalcedony | /r/HasProperty | an umbrella term
Facets:
value: for quartz
type: OTHER
Source sentences:
text: Chalcedony is an umbrella term for quartz containing microscopically small crystals, or cryptocrystalline quartzes.
text: As such, it actually is an umbrella term that encompasses a wide variety of semi-precious gemstones.
text: Chalcedony is an umbrella term for a specific variety of quartz, or silicon dioxide, which comes in an assortment of sizes and colors.