Gemstones and Cut Stones Reference Book: H-L Page 41



	ties with Olivenite and like this mineral it is a decomposition product of other copper compounds. Limonite: Iron Oxide, containing 59.8% Iron. This mineral occurs massive and earthy stalactitic, and the composition and crystallization are but imperfectly known. It is an important iron ore and called by the trade "brown hematite." It is brown on a fresh fracture, though the surface of many specimens is shmy black as though varnished. Although containing less iron than Hematite, on acount of its cheapness and the ease with which it works in the furnace, Limonite is an important ore of this metal. It occurs abundantly and in many localities. Linnaeite: A Sulphide of Cobalt. Sulphur 42%, Cobalt 58 %. The cobalt is sometimes replaced by nickel, iron or copper. It occurs in crystals, also massive, color pale steel-gray, tarnishing copper-red. Occurs in Prussia and Mineral Hill, Maryland. Linarite: A basic Sulphate of Lead and Copper. Lead Oxide 56%, Cupric Oxide 20%. Occurs in translucent elongated crystals and often tabular, is brittle and luster vitreous. Color deep azure-blue. It is found in Cumberland, Siberia, the Urals and at Linares, Spain, after which place it takes its name. Lithiophilite: A Phosphate of Iron, Manganese and Lithium. Phosphorus Protoxide 45%, Manganese Protoxide 45%. Very little Lithia or Iron. Occurs in crystals, massive and compact. Color salmon-pink to clove-brown. Found at Branchville, Conn., and at Tubbs' Farm, Norway, Maine, (see Triphylite). Lodestone: (see Magnetite). Lollingite: Essentially an Iron Diarsenide. Arsenic 73%, Iron 27%. Bismuth and Antimony are sometimes present. It is usually massive, rarely in crystals, with color silver-white or steel-gray. It occurs in Gunnison County, Colorado, in star-shaped crystalline aggregates, in twins and trillings, associated with Siderite and Barite. It is also found at Paris, Maine; at Eden-ville and Monroe, N. Y., and at various mines in North Carolina. This mineral belongs to the Marcasite group. Ludlamite: Iron Protoxide 53%, Phosphorus Pentoxide 30%. Occurs in small transparent tabular crystals, luster brilliant, color bright green. It occurs along the Rhine, and near Truro, Cornwall, England.

	Forty