The iron oxides in rock crystals are specularite, hematite and lepidocrocite.
晶氧化物裹为镜、、纤。
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We wish nothing, save to be alone and to learn, and to feel as if with each day our sight were growing sharper than the hawk's and clearer than rock crystal.
无所求, 只想独处和学习, 感每天的视力都变得更锐利, 水晶更清晰。
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