society > occupation and work > materials > raw material > mineral material > ore > [noun] > purer metallic part (2)
Metallurgy. The purer or more metallic part of a mineral, which sinks to the bottom of a crucible or furnace and is thereby separated out. Hence…
Mining. In plural. In the process of mechanical concentration: the purest ore, which is the first to separate. Cf. head-tin n. at compounds 4, heading…