Gemstones with SG 3.30
9 gemstones have a specific gravity range that includes 3.30. 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 |
|---|---|---|---|---|
| Chrome Diopside | 3.22 – 3.38 | 1.664 – 1.730 | Monoclinic | 5.5–6.5 |
| Star Diopside | 3.27 – 3.36 | 1.664 – 1.721 | Monoclinic | 5–6 |
| Jadeite | 3.24 – 3.43 | 1.654 – 1.688 | Aggregate | 6.5–7 |
| Diaspore | 3.30 – 3.39 | 1.685 – 1.752 | Orthorhombic | 6.5–7 |
| 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 |
| Kornerupine | 3.27 – 3.45 | 1.660 – 1.699 | Orthorhombic | 6.5 |
| Peridot | 3.27 – 3.48 | 1.654 – 1.690 | Orthorhombic | 6.5–7 |