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.
一无所求, 只想独处和学习, 感每一天的视力都变得比锐利, 比水晶清晰。
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