Gemstones with SG 2.65
17 gemstones have a specific gravity range that includes 2.65. 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 |
|---|---|---|---|---|
| Ametrine | 2.63 – 2.67 | 1.544 – 1.553 | Trigonal | 7 |
| Prasiolite | 2.63 – 2.67 | 1.544 – 1.553 | Trigonal | 7 |
| Coral | 2.60 – 2.70 | 1.486 – 1.658 | Aggregate | 3–4 |
| Amethyst | 2.63 – 2.65 | 1.544 – 1.553 | Trigonal | 7 |
| Citrine | 2.63 – 2.65 | 1.544 – 1.553 | Trigonal | 7 |
| Rock Crystal | 2.63 – 2.65 | 1.544 – 1.553 | Trigonal | 7 |
| Rose Quartz | 2.63 – 2.65 | 1.544 – 1.553 | Trigonal | 7 |
| Smoky Quartz | 2.63 – 2.65 | 1.544 – 1.553 | Trigonal | 7 |
| Aventurine | 2.64 – 2.69 | 1.544 – 1.553 | Trigonal | 7 |
| Sunstone | 2.62 – 2.65 | 1.537 – 1.572 | Triclinic | 6–6.5 |
| Hawk's Eye | 2.64 – 2.71 | 1.544 – 1.553 | Trigonal | 7 |
| Tiger's Eye | 2.64 – 2.71 | 1.544 – 1.553 | Trigonal | 7 |
| Scapolite | 2.50 – 2.74 | 1.540 – 1.572 | Tetragonal | 6–6.5 |
| Iolite | 2.57 – 2.66 | 1.535 – 1.547 | Orthorhombic | 7–7.5 |
| Charoite | 2.54 – 2.68 | 1.550 – 1.559 | Monoclinic | 5–6 |
| Pearl | 2.60 – 2.85 | 1.520 – 1.690 | Aggregate | 2.5–4.5 |
| Turquoise | 2.60 – 2.90 | 1.610 – 1.650 | Triclinic | 5–6 |