VARIEGATED COPPER-ORE. Ill The fracture is small and rather imperfect conchoidal, which sometimes approaches to fine-grained uneven. The fragments are indeterminate angular, and rather sharp edged. Neither colour nor lustre are changed in the streak. It is soft. It is sectile in a slight degree. It is easily frangible. It is heavy. Specific gravity, from the Bannat, 4.956, Rirwan. I'rom Lorraine, 4.983, Kirwan. 4.300, La Mether u. 5.467, Witdenman. 5.033, Lour non. Chemical Characters. It is fusible, but not so easily as copper-glance, and with less ebullition, into a globule, which acts powerfully °n the magnetic needle. Constituent Parts. From Hittcrd.ihl in Norway. From Rudelstadt in Silesia. Copper, - 69.50 58 Sulphur, - 19.00 19 Iron, - - 7.50 18 Oxygen, - 4.00 5 100.00 100 Klaproth, Beit. b. ii. s. 283. Ibid. s. 2S6. Geognostic Situation. It occurs in veins in primitive and transition rocks, Particularly in gneiss, mica-slate, talc-slate, and grey- Wacke. It is also met with in iloetz rocks, as in beds in I'ituniiuous marl-slate. In these repositories, it is asso-