Last Updated:2025/11/20

She examined the opal under a magnifying glass, noting the play of colors and its relatively low hardness compared to quartz.

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She examined the opal under a magnifying glass, noting the play of colors and its relatively low hardness compared to quartz.

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彼女はルーペでオパール(化学式SiO2·nH2Oの水和二酸化ケイ素鉱物)を調べ、その色の遊びや石英に比べて硬度がやや低いことに気づいた。

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