Gemstones with SG 3.50
6 gemstones have a specific gravity range that includes 3.50. 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 |
|---|---|---|---|---|
| Sphene | 3.45 – 3.55 | 1.843 – 2.110 | Monoclinic | 5–5.5 |
| Blue Diamond | 3.50 – 3.53 | 2.417 – 2.417 | Cubic | 10 |
| Diamond | 3.50 – 3.53 | 2.417 – 2.417 | Cubic | 10 |
| Sinhalite | 3.47 – 3.50 | 1.665 – 1.712 | Orthorhombic | 6.5–7 |
| Topaz | 3.49 – 3.57 | 1.609 – 1.643 | Orthorhombic | 8 |
| Rhodochrosite | 3.40 – 3.70 | 1.600 – 1.820 | Trigonal | 3.5–4 |