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NATIVE IRON. 197 VI. ORDER.—IRON. This Order contains nineteen species, viz. Native Iron, Iron-py rites, Radiated Pyrites, Hepatic Pyrites, Ma a netic Pyrites, Magnetic Ironstone or ore, Specular Iron- ore or Iron-glance, Red Ironstone, Brown Ironstone, Umber, Black Ironstone, Sparry Ironstone, Clay Iron stone, Bog Iron-ore, Pitchy Iron-ore, Blue Iron-ore, Cbromate of Iron, Cube-ore or Arseniate of Iron, and Pyrosmalite. 1. Native Iron. Gediegen Eisen, Werner. This species is divided into two subspecies, Terrestrial Native Iron, and Meteoric Native Iron. First Subspecies. Terrestrial Native Iron. Tellureisen, Werner. Gediegen Eisen, Charpeniicr, Mincralogische Geographic von Sachsen, s. 313.-Fossilcs gediegen Eisen, Klaproth, Wit. b. iv. s. 102.—Fer natif amorphe, Havy, lab. p. !)3. Mas sive Native Iron, Aikiti, p. 99'• External Characters. Its colour is steel-grey. N 3 u