gangue

Etymology

Borrowed from French gangue. Doublet of gang.

noun

  1. (mining) The earthy waste substances occurring in metallic ore.
    Thus the percentage recovery of metal from the ore was much higher than in the primitive process where the semi-vitrified gangue and half-smelted ore are typically rich in prills of copper and copper minerals. 1995, Paul T. Craddock, Early Metal Mining and Production, page 147

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