rock crystal

名词 n.

英文释义

名词 n.
  1. A clear, colorless form of the silica-based mineral quartz. countable,uncountable
    — […] I have for Trials sake taken Lumps of Rock Crystal, and Heating them Red hot in a Crucible, I found according to my Expectation, that being Quench’d in Fair water, even those that remain’d in seemingly entire Lumps, exchang’d their Translucency for Whiteness […]

词形变化

rock crystals plural
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