noun
milky quartz
A white, cloudy variety of quartz used in mineralogy and gemology.
乳石英は、その白濁した外観が特徴です。
Milky quartz is characterized by its cloudy white appearance.
Compound of 乳 (にゅう, 'milk') and 石英 (せきえい, 'quartz'), referring to its milky appearance.