Assertion: zircon | /r/HasProperty | made into zirconia
Facets:
value: by fusing the zircon
type: MANNER
Source sentences:
text: The less-pure zircon is made into zirconia, an oxide of zirconium, by fusing the zircon with coke, iron borings, and lime until the silica is reduced to silicon that alloys with the iron.