Quartz

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 340

kwSrts, ». {Min.) Silex, occurring crystallized, and also in ma es of various colors, more or le transparent, and sometimes opaque; rock crystal. — Quartzose', -os', Quartz'ous. -us, Quartz'y, -T, a. Containing, of the nature of, or resembling quartz.