Birthstone · October
October Birthstones
The most colorful month. October's two birthstones — opal and tourmaline — are long tied to creativity, imagination, and emotional honesty.
October is the most colorful month on the birthstone calendar. It carries two official modern stones: opal as the primary and tourmaline as the alternative. Opal is unlike any other gem — a hydrous silica that holds 3 to 21 percent water and flashes a shifting play-of-color as light moves across it. Tourmaline is the great spectrum stone, a borosilicate that grows in nearly every color there is, including the pink-and-green watermelon crystals it's loved for.
Crystal tradition has long tied October's stones to creativity, imagination, and emotional honesty — opal for the inner eye and hope, tourmaline for balance and protection. We've spent 14 years among stones like these. Below you'll find October's birthstones, the older traditions behind them, and the pieces we'd actually reach for — with an honest word about what to look for, because opal is a stone where treatment and imitation are common.
- Modern birthstone
- Opal
- also Tourmaline
- Color
- Iridescent play-of-color
- Tradition
- Long tied to creativity, imagination, and emotional honesty.
The stones we'd reach for
October crystals
Natural, quality-verified stones tied to the month — read what each is known for, then explore its full profile.
Tourmaline
A borosilicate (Mohs 7–7.5) that grows in nearly every color — black, pink, green, and the prized pink-and-green watermelon. Long associated in tradition with emotional balance and protection, and durable enough for daily wear; a natural, honest October stone.
Explore Tourmaline →
Black Tourmaline
Opaque jet-black schorl (Mohs ~7.25), the most-reached-for tourmaline. The stone crystal tradition turns to first for grounding and protection — an affordable, hard-wearing way to mark an October birthday.
Explore Black Tourmaline →
Fire Agate
A brown chalcedony quartz (Mohs 6.5–7) with iridescent flashes of red, orange, and green — it mirrors opal's play-of-color in a far tougher, more affordable stone, and won't dry out or craze the way opal can.
Explore Fire Agate →
Opal
Hydrous silica (Mohs 5.5–6.5) famous for its shifting play-of-color. Worth buying with care: much affordable 'opal' is a lab-grown stone, a doublet, or a triplet rather than solid natural opal. We disclose exactly what each piece is. Solid opal is also water-bearing and can crack if it dries — keep it from heat and harsh cleaners.
Explore Opal →
Across tradition
The older birthstone systems
Before the modern list, other traditions paired the month with their own stone.
Good to know
Questions about the October birthstone
What is the October birthstone?
October has two modern birthstones: opal is the primary and tourmaline is the official alternative. Either is a correct choice — and for everyday wear, tourmaline is the tougher of the two.
Is tourmaline an October birthstone?
Yes. Tourmaline was added as October's alternative birthstone in 1952 to give the month a durable, faceted option alongside opal. Its huge color range — especially watermelon tourmaline — has made it a favorite in its own right.
What color is the October birthstone?
Opal's signature is play-of-color — flashes of many colors shifting across a pale or dark body. Tourmaline covers the whole spectrum, from black to pink to green. October is less one color than all of them.
Is October opal always natural?
Not always — and it's the main thing to check. A lot of affordable opal is lab-created, or a thin slice backed and capped as a doublet or triplet. We tell you exactly what each stone is. If you want opal's fire in a guaranteed-natural, hard-wearing stone, fire agate is an honest alternative.
Is my birthstone the same as my zodiac stone?
Not always. A birthstone follows the calendar month; a zodiac stone follows your sun sign, and October spans Libra and Scorpio. Both threads are linked above.
The full collection
Find your crystal
Every stone hand-selected and quality-verified — most raw, some polished to reveal their natural beauty. Real stones, honestly sourced.
About Bliss · The Lineage
The crystal knowledge we share is grounded in years of hands-on work at Bliss Crystals — sourcing the stones, learning what each has meant across tradition, and passing it on with care.
Read our story →