December 22 – January 19 · Earth

Capricorn birthstones

Capricorn carries Garnet and Ruby in the zodiac tradition.

Garnet

Composition Group of silicate minerals — almandine, pyrope, spessartine and others
Hardness · System 6.5–7.5 · Cubic

Garnet is not one mineral but a family. Almandine gives the familiar deep red; tsavorite garnet is green and rarer than emerald.

Traditionally carried by travellers as a stone of safe return, and long associated with vitality and steady energy.

Ruby

Composition Aluminium oxide (Al₂O₃) — corundum coloured by chromium
Hardness · System 9 · Trigonal

Ruby and sapphire are the same mineral. Red corundum is ruby; every other colour is sapphire.

Traditionally associated with courage, appetite for life and decisive action.

Sign or month?

Capricorn runs December 22 – January 19, 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