Occurs in granular masses, coarse or fine; attracted by the magnet, or affecting the compass-needle; powder black; brittle; dissolves in muriatic acid; gravity 5.
Value.—An important ore, yielding sixty-five per cent.
Localities.—Found in granite, slate and limestone rocks. Warren, Essex, Clinton, Saratoga, Herkimer, Orange and Putnam Counties, N. Y.; Raymond and Marshall’s Island, Me.; Franconia, Jackson, Winchester, Lisbon, Swanzey and Unity, N. H.; Bridgewater, Chittenden, Marlboro, Rochester, Troy and Bethel, Vt.; Cambealon, R. I; Hawley and Bernardston, Mass.; Haddam, Conn.; Goshen, Webb’s Mine, Cornwall and White Marsh, Penn.; Hamburg, N. J.; Scott’s Mills and Deer Creek, Md.; Mitchell and Madison Counties, N. C.; Spartanburg, S. C.; Laclede and Crawford Counties, Mo.; Sierra County, (Gold Valley,) Plumas, Tulare, Mariposa, Placer and El Dorado Counties, Cal.
44.—Magnetic Pyrites.
Occurs massive; brittle; deep orange-yellow; powder grayish-black; metallic lustre; tarnishes easily; slightly attracts the compass-needle; melts at a high heat, giving off sulphur-fumes; gravity 4.5.
Value.—Affords sulphur, copperas and nickel.
Localities.—Found in granite regions, often with copper and iron ores. Stafford, Corinth and Shrewsbury, Vt.; Trumbull and Monroe, Conn.; Port Henry, Diana and Orange County, N. Y.; Hurdstown, N. J.; Gap Mine, Lancaster County, Pa.; Ducktown Mines, Tenn.
45.—Malachite.
Occurs in incrustations with smooth surface and fibrous; powder paler green than the mineral; brittle; by heat crackles and turns black; effervesces in acids; takes a fine polish, showing bands or rings; gravity 4.
Value.—Used for jewelry and inlaid work.