Gemstones with SG 2.45
5 gemstones have a specific gravity range that includes 2.45. 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 |
|---|---|---|---|---|
| Obsidian | 2.30 – 2.60 | 1.480 – 1.510 | Amorphous | 5–5.5 |
| Hauyne | 2.44 – 2.50 | 1.494 – 1.509 | Cubic | 5.5–6 |
| Variscite | 2.40 – 2.60 | 1.560 – 1.590 | Orthorhombic | 3.5–4.5 |
| Howlite | 2.45 – 2.58 | 1.583 – 1.608 | Monoclinic | 3.5 |
| Serpentine | 2.44 – 2.62 | 1.560 – 1.571 | Monoclinic | 3–4 |