Weight and Specific Gravity of the Common Minerals.
| NAME. | COMPOSITION. | Specific gravity. | Weight of cubic inch (ounces). | Weight of cubic foot (pounds). |
| Gold, pure | 19.3 | 11.169 | 1,206.25 | |
| Gold, native | Gold, silver, copper, iron | 17.5 | 10.128 | 1,093.75 |
| Silver, pure | 10.6 | 6.134 | 662.50 | |
| Silver, native | Silver and other metals | 10. | 5.787 | 625.00 |
| Copper, native | Copper | 8.9 | 5.150 | 556.25 |
| Vitreous Copper | Sulphuret of copper, 21; copper, 79 | 5.6 | 3.298 | 350.00 |
| Copper pyrites | Sulphur, 35; copper, 35; iron, 30 | 4.2 | 2.430 | 262.50 |
| Red copper | Copper, 89; oxygen, 11 | 5.9 | 3.414 | 368.75 |
| Gray copper | Sulphur, arsenic, antimony, silver, copper, iron, zinc, and mercury in most varying proportions | 4.8 | 2.777 | 300.00 |
| Malachite | Carbonic acid, 20; oxide of copper, 72; water, 8 | 3.8 | 2.199 | 237.50 |
| Tin oxide | Oxygen, 22; tin, 78 | 6.7 | 3.877 | 418.75 |
| Tin pyrites | Tin, 27; copper, 30; iron, 13; sulphur, 29 | 4.4 | 2.546 | 275.00 |
| Lead, pure | 11.4 | 6.597 | 712.50 | |
| Galena | Sulphur, 13; lead, 87 | 7.5 | 4.340 | 468.75 |
| Carb. of lead | Carbonic acid, 16; oxide of lead, 84 | 6.4 | 3.715 | 400.00 |
| Zinc | 7.0 | 4.051 | 437.50 | |
| Red oxide of zinc | Zinc, 80; oxygen, 19; oxide of manganese | 5.4 | 3.125 | 337.50 |
| Antimony | 6.8 | 3.935 | 425.00 | |
| Gray oxide of antimony | Sulphur, 29; antimony, 71 | 4.5 | 2.025 | 281.25 |
| Nickel | 8.4 | 4.861 | 525.00 | |
| Arsenical nickel | Arsenic, 56; nickel, 44 | 7.5 | 4.340 | 468.75 |
| Sulphuret | Nickel, sulphur, arsenic | 6.2 | 3.588 | 387.50 |
| Cobalt pyrites | Cobalt, 58; sulphur | 5.0 | 2.893 | 312.50 |
| Iron, cast | 7.2 | 4.166 | 450.00 | |
| Iron, wrought | 7.78 | 4.496 | 486.25 | |
| Iron pyrites | Sulphur, 53; iron, 47 | 4.9 | 2.835 | 306.25 |
| Magnetic iron | Oxygen, 28; iron, 72 | 5.1 | 2.951 | 318.75 |
| Arsenical iron | Arsenic, 46; sulphur, 20; iron, 34 | 5.7 | 3.298 | 356.25 |
| Specular iron | Oxygen, 30; iron, 70 | 4.9 | 2.835 | 306.25 |
| Hematite | Oxide of iron, 86; water, 14 | 4.0 | 2.314 | 250.00 |
| Uranium, or pitch-blende | Oxygen, 15; uranium, 85 | 7.0 | 4.051 | 437.50 |
| Baryta or heavy spar | 4.0 | 2.314 | 250.00 | |
| Lime rock | 3.0 | 1.736 | 187.50 | |
| Calc spar | 2.7 | 1.562 | 168.75 | |
| Fluor spar | 3.15 | 1.822 | 196.87 | |
| Quartz | 2.69 | 1.673 | 167.452 | |
| Granite | 2.78 | 1.608 | 173.75 |
Note.—A vein of ore one inch thick, six feet long, and six feet high, will measure three cubic feet; two inches, six cubic feet, and so on in proportion, allowing three cubic feet for every inch of ore in the lode, six feet high and six feet long.