20.—Chromic Iron.
Occurs in compact masses; powder dark brown; small pieces sometimes attracted by the magnet; brittle, breaking with uneven surface; with borax melts into a green globule; not acted upon by acids; little lustre; gravity 4.4.
Value.—Used in making the chrome pigments.
Localities.—Found in Serpentine. Bare Hills, Cooptown and north part of Cecil County, Md.; Nottingham, W. Goshen, Williston, Fulton, Mineral Hill, Texas and Unionville, Pa.; Jay, New Fane, Westfield and Troy, Vt.; Chester and Blanford, Mass.; Loudon County, Va.; Yancy County, N. C.; North Almaden, New Idria and Coloma, Cal.