noun
gangue; veinstone
Technical term in mining and geology for the non-valuable mineral material surrounding ore in a vein. Compare 脈石 (みゃくせき).
See also: 脈石 (みゃくせき)
鉱脈から取り出した鉱石には、ひ石が多く含まれていた。
The ore extracted from the vein contained a lot of gangue.