Assertion: emerald's color | /r/HasProperty | due
Facets:
value: to chromium
type: CAUSE
value: to the nature of light
type: CAUSE
value: to vanadium
type: OTHER
Source sentences:
text: Emerald is a deep green variety, the color is due to Chromium or Vanadium.
text: The color of a ruby is due to the element chromium.
text: The color of any material is due to the nature of light itself.
text: The color is due to growth of yellow bacteria and algae.