October's birthstone is Opal / Tourmaline, and its symbolic meaning is “Hope, Luck & Creativity.”

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CHARACTERISTICS

Mystical gem with rainbow colors. Known for beautiful "play of color".

EFFECTS & POWER

Enhances creativity and inspiration

🔎 Mineralogy in depth

Opal →

Mohs 5.5–6.5 · Hydrated silica (amorphous)

Tourmaline →

Mohs 7–7.5 · Tourmaline group

More October symbols

Birth flower Chrysanthemum → Birth color Madder Red →

Zodiac signs in October

♎ Libra → ♏ Scorpio →

Birthstone assignments vary by country, organization and era — there is no single official standard. This site uses widely recognized assignments (no invented scores or fortune claims). About our data