RUBY FAMILY. Constituent Parts. 8 6.0 3.0 4.0 7.0 100 According to Tennant, Phil. Trans, for 1802. Geognostic Situation. We know only of the geognostic situation of the Saxon emery, which occurs in beds of talc and steatite, along with blende and calcareous spar, in primitive clayslate. Geographic Situation. Europe.—It is found at Oehsenkopf near Schwartzen- berg, and Eibenstock in Saxony. Jersey and Guernsey are mentioned as localities of this species; but Dr Mac- culloch, who examined these islands, could neither find it, nor learn that it ever had been discovered there *, It occurs abundantly in the island of Naxos, in large loose masses, at the foot of primitive mountains, and al so at Smyrna. It is mentioned as a production of Parma in Italy, and of Ilonda, in the kingdom Granada, in Spain. Asia.—Near the town of Charlowa in the Altain Moun tains. America.—Mexico and Peru. Use. Alumina, Silica, Iron, Loss, * Macculloch, Geological Transactions, vol. L p. 12.