10月

October Birthstone

Opal / Tourmaline · オパール

MEANING

Hope, Luck & Creativity

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