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TINSTONE. 4 39 2. Tinstone. Zinnstein, Werner. Stannum Arscnico ct Ferro mincralisatum, Wall. t. ii. p. 31*). cl seq.—Zinnstein, Werner, Pabst. b. i. s. 171. Id. Bid. s. 880.—Common Tin-stone, Kirrv. vol. ii. p. 197.—Ftain vitreux, De Born, t. ii. p. 2S8.—Zinnkies, Emm. b. ii. s. 420. —Oxide d’Etain, Lam. t. i. p. 274.—Etain oxide, Hatty, t. iv. p. 137. La Pierre d’Etain, 011 In Mine d’Etain commune, Brock t. ii. p. 334.—Zinnstein, Rcnss, b. iv. s. 288. Id. Lad. b. i. s. 267. Id. Suck. 2‘er t b. s. 354. Id. Bert. s. 441. Id. Moh.t, b. iii. s. 596.—Etain oxide, Lucas, p. 150.—Zinnstein, Beonhard, Tabel. s. 75—Etain oxyde, Brong. t. ii. p. I89. Id. Brard, p. 335.—Zinnstein, Karslen, Tabel. s. 70. Id. Baus. s. 110.—Etain oxid£, Hatty, Tubl. p. 101—Native Oxyd of Tin, Kid, vol. ii. p. 147—Tinstone, Aikin, p. 51. , External Characters. Its most common colour is blackish-brown; from ^'hich it passes, on the one side, into brownish-black and Vel v e t black; pn the otber side, into hair-brown and ^'ddish-brown, from which it passes further into yellow-^ ^I'-green, yellowisli-wliite, and greenish-white. It occurs massive, disseminated, in rolled pieces, in £ ra ins, but most frequently crystallised, and in the fol lowing figures: I- The fundamental figure is a flat octahedron, in which the common base is square, fig. 247. This figure is rarely perfect, being usually more or less deeply truncated on the edges of the com- E e 4 mon