原げん石せき

noun

raw ore; unrefined ore

Refers to ore as mined, before smelting or processing. Used in mining and industrial contexts.

• この鉱こう山ざんでは良りょう質しつの原げん石せきが採とれる。

  High-quality raw ore is mined at this mine.

noun

rough gemstone; uncut gem

A gemstone in its natural state, before cutting and polishing. Also used metaphorically for a person with raw talent.

• 彼かれはまだ原げん石せきだが、磨みがけば光ひかるだろう。

  He's still a rough diamond, but with polishing he'll shine.

• この原げん石せきをカットして指ゆび輪わにします。

  We'll cut this rough gemstone and make it into a ring.