Assertion: metal | /r/HasProperty | opaque
Facets:
value: in terms of optical properties
type: OTHER
value: typically
type: DEGREE
Source sentences:
text: They are opaque once a certain minimum thickness is achieved.
text: Metals are opaqueness.
text: A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity.
text: In terms of optical properties, metals are opaque, shiny, and lustrous.