Porosity of Common Rocks
Porosity refers to the volume percentage of void spaces (pores) within a rock or sediment. These pores can be filled with air, water, or other fluids. The following table provides a curated list of porosity values for different rocks.
| Andesite | 10 - 15 |
| Basalt | 0.1 - 1.0 |
| Diorite | 0.3 - 2.7 |
| Dolerite | 1 - 2 |
| Dolomite | 1 - 5 |
| Gabbro | 0.3 - 2.7 |
| Gneiss | 0.5 - 1.5 |
| Granite | 0.1 - 4 |
| Limestone (hard) | 2.6 - 20 |
| Limestone (soft) | 2.6 - 20 |
| Marble | 0.5 - 2.0 |
| Quartzite | 0.1 - 0.5 |
| Rhyolite | 4 - 6 |
| Shale | 10 - 30 |
| Slate | 0.1 - 4.3 |
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018.