A 1.5-pound, 2,610-carat opal was found in the Virgin Valley, 125 miles northwest of Winnemucca (pop. 7,174), in 1917. Named for its owner, Col. W.A. Roebling-chief engineer on New York’s Brooklyn Bridge-the Roebling opal now resides at the Smithsonian Institution in Washington, D.C.
Found in: Trivia
