A type of silicate mineral. Blue or black plate-like crystals with a vitreous luster. Hexagonal crystal system. Found in the cavities of rhyolite and dacite. Discovered in Kagoshima Prefecture in 1953. Source: About Shogakukan Digital Daijisen Information | Legend |
珪酸塩鉱物の一種。ガラス光沢がある青色または黒色の板状の結晶。六方晶系。流紋岩やデーサイトの空隙などに産する。鹿児島県で発見され、昭和28年(1953)に 出典 小学館デジタル大辞泉について 情報 | 凡例 |
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