- Jewelry Identifier
- Birthstones
- December
* Birthstones
December birthstones
The traditional and modern birthstones for december are Tanzanite, Lapis Lazuli, Turquoise, Zircon. Below: Mohs hardness, specific gravity, and links to each gem’s full reference.
Published July 11, 2026
December stones
| Gem | Mohs | SG | Family |
|---|---|---|---|
| Tanzanite | 6.5–7 | 3.1–3.38 | zoisite |
| Lapis Lazuli | 5–6 | 2.5–3 | lapis lazuli (rock) |
| Turquoise | 5–6 | 2.6–2.91 | turquoise |
| Zircon | 6–7.5 | 3.93–4.73 | zircon |
* Frequently asked
FAQ
- Q. What is the december birthstone?
- A. December’s birthstones are Tanzanite, Lapis Lazuli, Turquoise, Zircon.
- Q. Modern vs traditional birthstones?
- A. Some months have both a traditional stone and a modern alternative (for example, December). Both are listed when our dataset includes them.
- Q. How do I identify my birthstone jewelry?
- A. Check hardness and density against the table below, read any gem-lab report, or scan the piece in the Jewelry Identifier app.
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