이산화 규소(SiO2)로 이루어진 매우 흔하고 단단한 광물로, 무색투명하거나 불순물에 의해 다양한 색을 띠며 결정형을 이룬다.
A hard, crystalline mineral composed of silicon dioxide, widely found in all types of rocks and often used in making glass, electronics, and jewelry.
예문:
"The geologist explained that the vein of white quartz contained traces of gold."
"Amethyst is a popular purple variety of quartz used in jewelry."
"The internal mechanism of the clock utilizes a tiny vibrating quartz crystal for precision."