金きん雲うん母も

noun

phlogopite

A magnesium-rich mica mineral, typically brownish, used in electrical insulation and as a heat-resistant material. Technical term in mineralogy.

• 金きん雲うん母もは耐たい熱ねつ性せいに優すぐれた鉱こう物ぶつです。

  Phlogopite is a mineral with excellent heat resistance.