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NATIVE SILVER. 43 Spanish America in rolled pieces *. Besides these, it presents the following particular and regular external shapes: dentiform, filiform, reticulated, in leaves, capil lary, which latter, when it is very much entangled, passes into compact. The crystallizations are the following: 1. Cube f. 2. Cube, truncated on the angles £. 3. Octahedron, either common or cuneiform ||. 4. Three-sided pyramid, bevelled on the edges, and also truncated on the angles and the summit; the pyramid either single or double. 6. Double six-sided pyramid, either perfect, or trun cated on the angles and summits. C. Leucite form. 7. Three-sided table, either perfect, or truncated on the angles. 8. Six-sided table, in which the terminal planes are set on alternately straight and oblique, and are bevelled. [). Itectangular four-sided prism, either perfect, or truncated on the angles ; sometimes acuminated with four planes, set on the lateral edges, and the acumination sometimes truncated, or in place of the truncation, the summit of the acumination bevelled, and the edges of the bevelment trun cated. 10. Six-sided prism. The * In the Imperial Cabinet of minerals nt Vienna, there is a rolled piece •f native silver from Spanish America, whiuh weighs upwards of 36 pounds. -f Argent natif cubique, Hauy. J Argent natif cubo-octaedre, Ilauy. |1 Argent natif octaedre, Hauy.