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348 FELSPAR FAMILY. blue colour, higher lustre, more distinct foliated fracture/ slightly inferior hardness, hut greater weight, and also by its chemical characters, and composition. X. FELSPAR FAMILY. Thi* Family contains the following Species : Andalu- site, Saussurite, Chiastolite, Indianite, Felspar, Spodu- mene, Bergmannite, Scapolite, Elaolite, Sodalite, Meion- ite, Nephelxne, and Ice-Spar. I. Andalusite. Andalusit, Werner. Spath adamantin d’un rouge violet, Bournon, Journ. de Pliys. 1789, p. 453.—rAndalusit, La Metk. Id. An 6. p. 386. Id. Reuss, b. iv. s. 135.—Foretaer Feldspath, Suck. 1, Abb. S. 396—Andalusit, Mohs, b. i. s. 423. Id. Karslen, Tabcl. s. 46. Id. Leonhard, Tabel. s. 19. Id. Brong. t. i. p. 363.— Fcld-spath apyre, Hauy, Tabl. p. 60—Andalusit, Steffens, b. i. s. 455. Id. Hoff b. ii. s. 291. Id. Lenz, b. i. s. 484. Id. Oken, b. i. s. 317. External Characters. Its colour is flesh-red, which sometimes inclines to pearl-grey. It occurs massive, and crystallised in rectangular four sided prisms, in which the terminal angles and lateral edges are sometimes truncated. 1 he crystals are seldom large, generally middle-sized 6r small, and almost always imbedded. Tire