noun
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
この鉱山では鉄鉱石が採れる。
Iron ore is mined at this mine.
鉱石ラジオは、電源なしで放送を受信できる。
A crystal radio can receive broadcasts without a power source.