 Miners Toolbox Index  General Engineering Rock Properties Rock Density | Average Specific Gravity of Various Rock Types | | Material | Specific Gravity | Tons / Cubic Yard | | Andesite | 2.5 - 2.8 | 2.11 - 2.36 | | Basalt/Traprock | 2.8 - 3.0 | 2.36 - 2.53 | | Coal - Anthracite | 1.3 | 1.08 | | Coal - Bituminous | 1.1 - 1.4 | 0.92 - 1.18 | | Copper Ore | 2 | 1.89 | | Diabase | 2.6 - 3.0 | 2.19 - 2.53 | | Diorite | 2.8 - 3.0 | 2.36 - 2.53 | | Dolomite | 2.8 - 2.9 | 2.36 - 2.44 | | Earth (dry) | 1.6 - 1.8 | 1.35 - 1.52 | | Earth (wet) | 2 | 1.6875 | | Gneiss | 2.6 - 2.9 | 2.19 - 2.44 | | Granite | 2.6 - 2.7 | 2.19 - 2.28 | | Gypsum | 2.3 - 2.8 | 1.94 - 2.36 | | Iron Ore | 4.5 - 5.3 | 3.79 - 4.47 | | Lead Ore (Galena) | 7.5 | 6.21 | | Limestone | 2.3 - 2.7 | 1.94 - 2.28 | | Marble | 2.4 - 2.7 | 2.02 - 2.28 | | Mica, schist | 2.5 - 2.9 | 2.09 - 2.43 | | Quartzite | 2.6 - 2.8 | 2.19 - 2.36 | | Rhyolite | 2.4 - 2.6 | 2.02 - 2.19 | | Rock Salt | 2.5 - 2.6 | 2.11 - 2.19 | | Sandstone | 2.2 - 2.8 | 1.85 - 2.36 | | Shale | 2.4 - 2.8 | 2.02 - 2.36 | | Slate | 2.7 - 2.8 | 2.28 - 2.36 | | Talc | 2.6 - 2.8 | 2.19 - 2.36 |
Density (in lb/cu ft.) = SG X 62.4 | Density (SI units) = SG X Density of water
(1.0 g/cc or 1000 kg/cubic metre) |
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