Gemstones with SG 3.25
6 gemstones have a specific gravity range that includes 3.25. Specific gravity measures density relative to water — a key diagnostic property for gem identification. Measured by hydrostatic weighing or heavy liquids.
| Gemstone | SG Range | RI Range | Crystal System | Hardness |
|---|---|---|---|---|
| Enstatite | 3.20 – 3.30 | 1.663 – 1.673 | Orthorhombic | 5–5.5 |
| Clinohumite | 3.13 – 3.35 | 1.625 – 1.675 | Monoclinic | 6 |
| Thulite | 3.10 – 3.38 | 1.691 – 1.704 | Orthorhombic | 6–7 |
| Chrome Diopside | 3.22 – 3.38 | 1.664 – 1.730 | Monoclinic | 5.5–6.5 |
| Jadeite | 3.24 – 3.43 | 1.654 – 1.688 | Aggregate | 6.5–7 |
| Tourmaline | 3.01 – 3.26 | 1.624 – 1.644 | Trigonal | 7–7.5 |