Amber
JewelryWiki Editorial·1 source·Reviewed 2026-07-31
Fossilised tree resin, not a mineral. Specific gravity near 1 means it floats in saturated saltwater — the classic field test.
Properties
| Property | Value | Authority |
|---|---|---|
| Refractive index | 1.539–1.545 [1] | — |
| Specific gravity | 1.05–1.09 [1] | — |
Sources
- International Gem Society — reference charts (Mohs hardness, specific gravity, refractive index) — International Gem Society (IGS reference charts)