61.—Silicate of Copper.
Occurs in incrustations and masses; color bluish-green; not fibrous; surface smooth; easily cut; does not effervesce in acid; blackens by heat; gravity 2.
Value.—An ore of copper, yielding thirty per cent.
Localities.—Found with other copper ores. Somerville and Schuyler’s, N. J.; Morgantown and Cornwall, Pa.; Wolcottville, Conn.; Big Williams’ Fork, Ariz.