quartz

Part of speech: adjective

Quartzose.

Part of speech: noun

A hard mineral, common in rocks, as in granite.

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Usage examples "quartz":

  1. Frobenius thinks these were relics dating from past ages of culture, when the manipulation of quartz and granite was thoroughly understood and when iron manipulation gave evidence of a skill not met with to- day. - "The Negro", W.E.B. Du Bois.
  2. What's quartz diggin's, then? - "Gold Seekers of '49", Edwin L. Sabin.
  3. The quartz veins also lie in this general course, one of which may be traced hundreds of miles. - "Journal of a Trip to California by the Overland Route Across the Plains in 1850-51", E. S. (Eleazer Stillman) Ingalls.