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5G SILVER. 4>. Arsenical Silver-Ore. Arseniksilber, Werner. Id. Wern. Pabst. b. i. s. 28.—Argent arsenical, Be Born, t. ii, p. 417—Arsemkahsch gediegen Silbej-, Wid. s. 6'87 Arse- nicated native Silver, Kirn. vol. ii. p. n 1—Arsenicsilber, Estner, b. in. s. 342. Id. Emm. b. ii. s. 165—L’Argent ar senical, Brock, t ii. p. 122—Argent antimonial, arsenifere, et ierrifere, llamj, t. iii. p. 398—Arsenik-silber, Reuss b iii s. *99. M. Lud h. ii. s. 211. Id. Suck. 2ter t h. s . 144. Id Bert. s. 503. Id. Mohs, b. iii. s. 131. Id. Leonhard, Tabel. s. 53—Argent arsenical, Brong. t. ii. p. 250—Silber-arsenik, Uirsten, Tabel. s. 74—Silver alloyed with Arsenic and Iron' ' Kid, vol. ii. p. 86—Argent antimonial ferro-arsenifere, Hauy, bl. p. 74—Arsenical Antimonial Silver, Aikin, p. 19. External Characters. Its colour is tin-white, which passes into silver-white and verges on light lead-grey. * ]o It is always more or less tarnished with a blackish co- It occurs massive, disseminated, small reniform, glo bular, and crystallised in rectangular four-sided prisms. Internally it is shining or glistening, which borders on glimmering ; and the lustre is metallic. - . lhe fracture is imperfect foliated, and is sometimes spherical, sometimes straight foliated, and in other di rections even. The fragments are indeterminate angular, and blunt, edged. _ It occurs in small and fine granular distinct concre tions; also in thin and curved lamellar distinct concre tions,