Assertion: cassiterite | /r/HasProperty | smelted
Facets:
Source sentences:
text: In the adopting release, the SEC conceded that, as a practical matter, it is very difficult, if not impossible, to trace conflict minerals to their mine or other location of origin after columbite-tantalite, cassiterite, and wolframite have been smelted initially and after gold has been refined initially, other than through the smelter or refiner.