Density of Quartz: Specific Gravity and Mohs Hardness
The density of quartz is about 2.65 g/cm3, equal to a specific gravity of 2.65, with a Mohs hardness near 7. One cubic meter of solid quartz weighs roughly 2.65 tonnes.
| Property | Value |
|---|---|
| Density | 2.65 g/cm3 |
| Specific gravity | 2.65 |
| Mohs hardness | 7 |
| Mass of 1 m3 | about 2.65 tonnes |
Why it matters
The standard grain of sandstone and the reference point of the Mohs scale; its density anchors matrix density calculations across petrophysics. Mineral densities are the building blocks of rock density: weight them by volume fraction and the bulk rock number follows, which is exactly what the calculator below does.
Use these values
- Rock Density Calculator to combine mineral densities into rock density.
- Mohs Hardness Identification Tool to identify minerals by scratch test.
- The Property Library for every mineral, rock, and soil on this site.
Related Calculators and Reference
- Rock Density and Specific Gravity Calculator, to turn a specific gravity straight into a density in whichever unit the report wants.
- Rock Density Calculator from Mineral Composition, to build a bulk density from modal percentages rather than guessing at one.
- Density of Gypsum Mineral, for the mineral that usually sits alongside it in the same rock.
- Density of Hematite, for the next comparison most people reach for.
- USGS Mineral Resources Program, published mineral property data and commodity reports.