November 22 – December 21 · Fire

Sagittarius birthstones

Sagittarius carries Turquoise and Topaz in the zodiac tradition.

Turquoise

Composition Hydrated copper aluminium phosphate (CuAl₆(PO₄)₄(OH)₈·4H₂O)
Hardness · System 5–6 · Triclinic

Porous enough to absorb oils and change colour over years of wear — some cultures read that shift as meaningful.

Traditionally the classic travel-protection stone, also linked to plain speech.

Topaz

Composition Aluminium fluorosilicate (Al₂SiO₄(F,OH)₂)
Hardness · System 8 · Orthorhombic

Nearly all blue topaz on the market began as colourless stone, irradiated and heated to produce the colour.

Traditionally linked to confidence, clear intention and honest self-assessment.

Sign or month?

Sagittarius runs November 22 – December 21, which crosses two calendar months — so the zodiac stone and the monthly birthstone may or may not agree depending on your exact date. Neither system overrules the other; the zodiac one is simply older.

Compare against the monthly chart →

← All zodiac birthstones

Two systems, one birth date

Sagittarius spans 2 calendar months, so you have more than one birthstone

Zodiac stones Turquoise, Topaz
Months it covers November and December
Stones of those months Topaz, Citrine, Turquoise, Zircon, Tanzanite
In both systems Turquoise, Topaz

November 22 – December 21 — so the sign opens in one month and closes in another. Why the two lists never line up →

The split is uneven: 9 days fall in November and 21 in December. So most people with this sign — 70% — are sold the December stone.

Both stones — Turquoise and Topaz — also sit in the monthly list somewhere, which is the usual case.

November Topaz, Citrine December Turquoise, Zircon, Tanzanite

The stones themselves

Stone Mohs Crystal system Main sources
Turquoise 5–6 Triclinic Iran, USA (Arizona, Nevada), China
Topaz 8 Orthorhombic Brazil, Nigeria, Pakistan

Turquoise is the softer at 5–6 on the Mohs scale — below 7, which means household dust scratches it, so it belongs in earrings or a pendant rather than an everyday ring. What the scale means →

Turquoise

Hydrated copper aluminium phosphate (CuAl₆(PO₄)₄(OH)₈·4H₂O) Mined in Sinai from 3000 BCE; central to Persian and Ancestral Puebloan jewellery

Topaz

Aluminium fluorosilicate (Al₂SiO₄(F,OH)₂) Named after Topazios, a Red Sea island — which actually produced peridot, not topaz