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33 HORNBLENDE FAMILY. 6. Diallage. » Smaragdit, Saussure, Voyage, v. p. 198. § 1313.; p. 269. § 1362. —Feldspath vert, R. de Lisle, t. ii. p. 544.—Schorl feuillete verdatre en grand lames, De Born, Catal. t. i. p. 3S0.—Eme- raudite, Smaragdite, Dauhenlon, Tabl. p. 15.—Diallage verte, Hany, t. iii. p. 126.—Schmaragdit, Leonhard, Tabel. s. 29- —Diallage verte, Brong. t. i. p. 442.—Schmaragdit, Karstcn, Tabel. s. 40. Id. Haus. s. 92.—Diallage verte, Hauy, Tabl. p. 46.—Diallage, Steffens, b. i. s. 326.—Smaragdit, Lenz. b. ii. s. 658.—Diallage, Oken, b. i. s. 330. External Characters.' Its colours are grass-green, apple-green, and hair- brown ? It occurs massive and disseminated. Its lustre is shining and glistening, and pearly. The fracture is foliated; twofold nearly rectangular cleavage; only one of the cleavages distinct. The fragments are indeterminate angular. It is translucent on the edges. It is hard, inclining to semi-hard. It is brittle. It is difficultly frangible. Specific gravity, 3.140, Saussure. 3.0, Kopp. Chemical Characters. It is said to melt easily before the blowpipe. Constituent’