Assertion: tungsten's ore | /r/HasProperty | crushed
Facets:
Source sentences:
text: Tungsten ores are crushed, cleaned and treated with alkalis to form tungsten trioxide (WO 3 ).
text: The ore is crushed, heated and treated with chemicals.
text: The ore is first crushed and milled to liberate the tungsten mineral crystals.
text: The exact process varies by manufacturer and ore composition, but ores are crushed then roasted and/or sent through a variety of chemical reactions, precipitations, and washings to obtain ammonium paratungstate (APT).