October Birthstone: Opal & Tourmaline Meaning, Colors & Rings (2026 Guide)
October has two birthstones: opal and tourmaline. Opal is famous for its play-of-color, flashes of rainbow light that shift as the stone moves, while tourmaline comes in more colors than almost any other gem, with pink tourmaline the most popular October choice. Opal is also the traditional gemstone for the 14th wedding anniversary, and tourmaline for the 8th.
This guide covers the meaning, colors, history, and durability of both October birthstones, how to care for them, and our best-selling opal rings and tourmaline jewelry.
October Birthstones at a Glance
| Opal | Tourmaline | |
|---|---|---|
| Colors | White, black, crystal, fire (orange-red), and boulder, with rainbow play-of-color | Pink, red, green, blue, watermelon (pink and green), and more |
| Hardness (Mohs) | 5.5 to 6.5 | 7 to 7.5 |
| Main sources | Australia, Ethiopia, Mexico | Brazil, Africa, Afghanistan, USA |
| Symbolism | Hope, creativity, inspiration | Love, compassion, balance |
| Anniversary | 14th | 8th |
Opal: October's Rainbow Birthstone
Opal is made of tiny spheres of silica with water trapped between them. When light passes through these spheres, it diffracts into flashes of spectral color, an effect called play-of-color. No two opals look alike, which is a big part of their appeal as engagement and birthstone rings.
Types of opal
- White opal has a light, milky body color with pastel flashes. It is the most popular opal for engagement rings. Shop opal engagement rings.
- Black opal has a dark body that makes its colors look especially vivid. It is the rarest and most valuable type.
- Crystal opal is transparent to semi-transparent with bright play-of-color.
- Fire opal glows in orange, red, and yellow, often without play-of-color. Read our fire opal guide.
- Boulder opal forms in thin veins within ironstone rock and is cut with the host rock attached.
Where opal comes from
Australia produces most of the world's precious opal, including famous black opal from Lightning Ridge. Ethiopia became a major source in the 2000s, and Mexico is known for fire opal. Learn more in our guide to Pacific opal.
Opal meaning and history
The ancient Romans prized opal as a symbol of hope and good fortune because it seemed to contain the colors of every gem. Opal's undeserved reputation for bad luck traces back largely to Sir Walter Scott's 1829 novel Anne of Geierstein, in which an opal plays an ominous role. Today, opal is associated with creativity, inspiration, and self-expression.
Is opal good for an engagement ring?
Yes, with the right setting and care. At 5.5 to 6.5 on the Mohs scale, opal is softer than sapphire or diamond, so it can scratch or chip with rough wear. A protective halo or bezel setting helps shield the stone, and it's best to remove your ring for sports, gym workouts, and household cleaning.
Tourmaline: October's Colorful Birthstone
Tourmaline shows one of the widest color ranges in the gem world. Its name comes from the Sinhalese word turmali, a term used in Sri Lanka for mixed colored gemstones. Tourmaline was added as an alternative October birthstone in 1952, and pink tourmaline is the most popular choice for October birthdays.
Popular tourmaline colors
- Pink tourmaline ranges from soft blush to vivid hot pink.
- Rubellite is the name for intense pink to red tourmaline.
- Watermelon tourmaline has a pink center surrounded by a green rim, just like a slice of watermelon.
- Paraíba tourmaline glows in neon blue to green thanks to traces of copper, and is among the most valuable colored gemstones.
- Green tourmaline, sometimes called verdelite, ranges from mint to deep forest green.
A gem with an electric personality
Tourmaline is pyroelectric: when warmed, it develops an electrical charge that can attract dust and small particles. Dutch traders who noticed this reportedly used tourmaline to pull ash from their pipes.
Is tourmaline durable?
At 7 to 7.5 on the Mohs scale, tourmaline is durable enough for rings, earrings, and pendants with normal care.
Best-Selling Opal Rings for October Birthdays
Shop all opal engagement rings →
Pink Tourmaline Jewelry
- Diamond & Pink Tourmaline Crown Ring in 14K White Gold
- Pink Tourmaline Earrings
- Pink Tourmaline Bezel Necklace
Want a tourmaline engagement ring? Any of our settings can be made with tourmaline through a custom design request.
How to Care for Opal and Tourmaline
- Clean gently with warm water, mild soap, and a soft cloth.
- Avoid ultrasonic and steam cleaners for opal, and avoid sudden temperature changes, which can cause opal to crack.
- Keep opal away from harsh chemicals, and don't soak it for long periods.
- Store separately from harder gems like diamonds and sapphires to prevent scratches.
For more tips, read caring for your white opal ring.
October Birthstone FAQ
What is the birthstone for October?
October has two birthstones: opal and tourmaline. Pink tourmaline is the most popular tourmaline color for October.
What does the October birthstone mean?
Opal symbolizes hope, creativity, and inspiration, while tourmaline is associated with love, compassion, and balance.
Which October birthstone is better for a ring?
Tourmaline is harder (7 to 7.5 on the Mohs scale) and better suited to everyday wear. Opal (5.5 to 6.5) is a beautiful ring stone but needs a protective setting and more careful wear.
Is opal bad luck?
No. The superstition largely comes from Sir Walter Scott's 1829 novel Anne of Geierstein. For centuries before that, opal was considered a stone of good fortune and hope.
What anniversary is opal for?
Opal is the traditional gemstone for the 14th wedding anniversary, and tourmaline is the gemstone for the 8th.
Explore more birthstones: September (sapphire) and November, or find your stone in our guide to birthstones by zodiac.
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