Assertion: chalcopyrite's color | /r/HasProperty | derived
Facets:
value: from chromium
type: OTHER
Source sentences:
text: The color of many gemstones is derived from trace amounts of chromium.
text: Its use declined significantly in the 17th century as alternative green colors were developed.
text: The red color of rubies, the pink of some sapphires, and the green color of emeralds are derived from chromium.