 | Francis Lieber, Edward Wigglesworth, Thomas Gamaliel Bradford - 1830 - 636 páginas
...acute, double, six-aided pyramids, with triangular planes. It also occurs massive. The cross-fracture of the crystallized is often conchoidal, with a vitreous...massive varies greatly in respect of hardness and color. It is sometimes sectile and soft. The fracture is even, or flat conchoidal. Specific gravity,... | |
 | Francis Lieber, Edward Wigglesworth, Thomas Gamaliel Bradford - 1830 - 634 páginas
...often couchoidal, with a vitreous lustre : the massive vorirs greatly in respect of hardness and color. It is sometimes sectile and soft. The fracture is even, or flat conchoidal. Specific gravity, 4.8 to 5.4. It consists, according to Cheiievix, of 81 copper and 19 sulphur. It occurs in veins and beds,... | |
 | Francis Lieber, Edward Wigglesworth, Thomas Gamaliel Bradford, Henry Vethake - 1830 - 648 páginas
...acute, double, six-sided pyramids, with triangular planes. It also occurs massive. The cross-frarture of the crystallized is often conchoidal, with a vitreous lustre : the massive varies greatly in resjrect of hardness and color. It is sometimes sectile and soft. Tim fracture is even, or flat conchoidal.... | |
 | Encyclopaedia Americana - 1830 - 632 páginas
...triangular planes. It also ocelli's massive. The cross-fracture of the crystallized is often conclioidal, with a vitreous lustre: the massive varies greatly in respect of hardness and color. It is sometimes sectile and soft. The fracture is even, or flat couchoidal. Sj№cific gravity,... | |
 | Encyclopaedia Americana - 1830 - 636 páginas
...acute, double, six-sided pyramids, with triangular planes. It also occurs massive. The cross-fracture of the crystallized is often conchoidal, with a vitreous lustre : the massive varies rally in respect of hardness and color, is sometimes sectile and soft. The fracture is even, or flat... | |
 | Sir Daniel Keyte Sandford - 1841 - 510 páginas
...acute, double, six-sided pyramids, with triangular planes. It also occurs massive. The cross-fracture of the crystallized is often conchoidal, with a vitreous...fracture is even, or flat conchoidal. Specific gravity, 4-8 to 5-4. It consists, according to Chenevix, of 81 copper and 19 sulphur. It occurs in veins and... | |
 | Francis Lieber, Edward Wigglesworth, Henry Vethake - 1851 - 640 páginas
...acute, double, six-sided pyramids, with triangular planes. It also occurs massive. The cross-fracture of the crystallized is often conchoidal, with a vitreous...massive varies greatly in respect of hardness and color. It is sometimes sectile and soft. The fracture is even, or flat couchoidal. Specific gravity,... | |
 | Popular encyclopedia - 1879 - 514 páginas
...acute, double six-sided pyramids, with triangular planes. It also occurs massive. The crossfracture of the crystallized is often conchoidal with a vitreous...fracture is even, or flat conchoidal. Specific gravity, 4'8 to 5'8. It consists of 81 copper and 19 sulphur. It occurs in veins and beds in primitive and early... | |
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Copper is of a lead or irongray color. It occurs crystallized in regular six-sided prisms, mostly modified on the terminal edges, and in acute, double, six-sided pyramids, with triangular planes. It also occurs massive. The cross-fracture of the crystallized... 