Turquoise
JewelryWiki Editorial·3 sources·Reviewed 2026-07-31
Porous and commonly stabilised or impregnated — a treatment that must be disclosed in US sales.
Properties
| Property | Value | Authority |
|---|---|---|
| Refractive index | 1.610–1.650 [1] | — |
| Specific gravity | 2.31–2.84 [1] | — |
| Crystal system | Triclinic [3] | — |
| Birthstone month | December — one of three official December stones, with tanzanite and blue zircon. [2] | — |
Sources
- International Gem Society — reference charts (Mohs hardness, specific gravity, refractive index) — International Gem Society (IGS reference charts)
- Jewelers of America — Birthstones — Jewelers of America (Jewelers of America, Birthstones)
- Wikipedia — mineral article infoboxes (crystal system) — Wikipedia contributors (Wikipedia mineral infoboxes)