The iron oxides in rock crystals are specularite, hematite and lepidocrocite.
晶氧化物裹为、赤、纤。
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These rock crystals are made from a mineral called gypsum and they are over a meter long.
这些岩石晶体由一种叫做石膏的矿物构成，长度过一米。
And then those are an ancestor of Liezenstein and reading stones, which I think were often made of something like rock crystal.
然后这些是利森斯坦和读石的祖先，我认为常是由类似岩石水晶的材料制成的。
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划词翻译
详细解释
氧化物
裹为
、赤、纤。
室 
过一米。
常是由类似
