DIALlAGE. 39 Constituent Parts. Silica, - Magnesia, Alumina, Lime, - Chrome, - Iron, - Copper, - ’ - Vauquelin. Ccognostic and Geographic Situations. Europe.—It occurs in the island of Corsica, along with saussurite; and with the same mineral on Mont llosa in Switzerland ; along with kyanite and precious garnet, in the Saualp in Carinthia; and in primitive rocks in Transylvania. Asia.—In India, along with quartz and rutile. America.—In Labrador, associated with saussurite. Uses. The mixture of diallage and saussurite, named Gabbro by the Italians, Eupholide by the French, and by artists Verde di Corsica duro, when cut and polished, has a beautiful appearance: hence it is much prized, and is cut into tables, and a variety of ornamental articles, such as snuff-boxes, ring-stones, &c. Observations. 1. It is so nearly allied to Granular Actynolite, that it has been frequently confounded with it; but its pearly lustre, single cleavage, (at least the second is very indis- C 4? tincL 50.00 6.00 11.00 13.00 7.05 6.30 1.50