鉱こう石せき

noun

ore; mineral; crystal

Refers to naturally occurring solid material from which a metal or valuable mineral can be extracted. In some contexts, especially in electronics or hobbyist use, can refer to a crystal (e.g., for radios).

See also: 脈石

• この鉱こう山ざんでは鉄てっ鉱こう石せきが採とれる。

  Iron ore is mined at this mine.

• 鉱こう石せきラジオは、電でん源げんなしで放ほう送そうを受じゅ信しんできる。

  A crystal radio can receive broadcasts without a power source.