Assertion: nickel | /r/ObjectUse | used for a variety of purposes
Facets:
value: added as a colorant
type: PURPOSE
Source sentences:
text: Nickel is also used for a variety of purposes including the production of coins, nickel-cadmium and nickel-metal hydride batteries; as a catalyst for certain chemical reactions; and, as a colorant, nickel is added to glass to give it a green color.