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PLATINIFEROUS COPPER-ORE; 425 Observations. The preceding description was given to me by Mr Vi vian, and seems to apply to the mineral described in p. 35. vol. ii. under the name Fibrous Cyanite. The present name has been given to this mineral by Werner, who considers it as forming a distinct species. 6. Platiniferous Coppcr-Ore. Cuivre gris platinifere, Lucas. Id. Vauquclin, Ann. dc Chim. Ixx. p. 317. & Journ. de Phy* t. 73. p. 412. External Characters. / This mineral is of a grey colour, and nearly resembles In other characters grey copper-ore. Constituent Parts. It contains Copper, I.ead, Antimony, Iron, Silver, Platina, and sometimes Sulphur. Some specimens have afforded 10 percent, of platina, while others have scarcely yielded any; and the proportion of silver is also very variable. Geographic Situation. It occurs at Guadalcanal, in Estremadura in Spain, where it is associated with arsenical silver-ore, calcareous- *par, heavy-spar, and quartz. 7. Crichtonite.
