Assertion: citrine's color | /r/HasProperty | produced
Facets:
value: by heating certain types of amethyst
type: MANNER
value: anywhere in the world
type: LOCATION
Source sentences:
text: Reports of a quartz gemstone of mixed purple and yellow color being produced anywhere in the world begin in the 1960s from vague localities in Brazil, Bolivia, and Uruguay.
text: A deep brown color is produced by heating certain types of amethyst.
text: A deep brown color is produced by heating certain types of amethyst.
text: The color of smoky quartz is produced when natural radiation, emitted from the surrounding rock, activates color centers around aluminum impurities within the crystalline quartz.
text: Other desirable colors of cubic zirconia can be produced including near colorless, yellow, pink, purple, green, and even multicolored.