Assertion: metal | /r/HasProperty | lustrous
Facets:
value: in terms of optical properties
type: OTHER
Source sentences:
text: Metals are shiny and lustrous, at least when freshly prepared, polished, or fractured.
text: If solid, they have a submetallic appearance (with the exception of sulfur) and are mostly brittle, as opposed to metals, which are lustrous, and generally ductile or malleable; they usually have lower densities than metals; are mostly poorer conductors of heat and electricity; and tend to have significantly lower melting points and boiling points than those of metals.
text: In terms of optical properties, metals are opaque, shiny, and lustrous.
text: Metals are shiny and lustrous, at least when freshly prepared, polished, or fractured.