Sentence Examples

  • The rocks are probably of quartz, i.e.
  • Brewster, apply the name of amethyst to all quartz which exhibits this structure, regardless of its colour.
  • The quartz-schists consist of quartz and white mica, and are intimately related to quartzites.
  • The prevailing formations appear to be granites which are veined with white quartz, and underlie old sedimentary brown sandstone and limestone formations.
  • In East Siberia gold is obtained almost exclusively from gravel-washings, quartz mining being confined to three localities, one near Vladivostok and two in Transbaikalia.

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