Assertion: metal | /r/HasProperty | gray
Facets:
value: often
type: DEGREE
Source sentences:
text: Metals are gray and shiny Photons (particles of light) cannot penetrate the metal, so they bounce off the sea of electrons.
text: This holds equally for all photons of the visible spectrum, which is why metals are often silvery white or grayish with the characteristic specular reflection of metallic luster.
text: Whereas most metals are gray or silvery white, gold is slightly reddish-yellow.