What does the word quartz mean?

Usage examples for 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 by W.E.B. Du Bois
  2. What's quartz diggin's, then? – Gold Seekers of '49 by 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 by E. S. (Eleazer Stillman) Ingalls