noun
rock-forming minerals
Technical term in geology for the minerals that constitute rocks. Used in academic and scientific contexts.
花崗岩の主な造岩鉱物は石英、長石、雲母です。
The main rock-forming minerals of granite are quartz, feldspar, and mica.
Compound of 造岩 (zōgan, 'rock-forming') + 鉱物 (kōbutsu, 'mineral').