noun ダウンロード 🔗共有 磁鉄鉱 A magnetic mineral, Fe3O4, one of the primary ores of iron. It has also been called lodestone. Examples : "The student used a strong magnet to pick up the tiny pieces of magnetite from the sand. " 生徒は砂から微小な磁鉄鉱の破片を拾うために強力な磁石を使った。 material substance mineral geology chemistry AIとチャット語彙ゲーム読解練習
