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Home Gemstones October Birthstones

October Birthstones: Opal and Tourmaline

Shop natural loose October birthstones, from shimmering opal to vibrant tourmaline, ideal for custom jewelry, meaningful gifts and gemstone collections.

October Birthstones Weight
October Birthstones Size
October Birthstones Clarity
October Birthstones Price

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color October Birthstones
Black October Birthstones
Blue October Birthstones
Brown October Birthstones
Golden October Birthstones
Gray October Birthstones
Green October Birthstones
Multicolor October Birthstones
Orange October Birthstones
Pink October Birthstones
Purple October Birthstones
Red October Birthstones
Turquoise October Birthstones
Violet
White October Birthstones
Yellow October Birthstones
Single
Pairs
Lots
Faceted
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8.69ct Multicolor Boulder Opal, Pear Shape, Translucent

20 x 12.3 mm

$ 66.64

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1.07ct Multicolor Opal, Oval, Opaque

8.4 x 6.7 mm

$ 29.32

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0.53ct Green Tourmaline, Emerald Cut, VS

4.7 x 4.1 mm

$ 26.39

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2.08ct Multicolor Black Opal, Sphere / Ball, Opaque

7.5 mm

$ 62.15

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20.02ct Multicolor Black Opal, Cushion, Opaque

18 x 18 mm (calibrated)

$ 1,001.00

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6.91ct Multicolor Opal Triplet, Fancy, Opaque

18 x 13.8 mm

$ 172.06

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2.19ct Multicolor Black Opal, Marquise, Translucent

18.6 x 6.6 mm

$ 66.66

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1.34ct Multicolor Black Opal, Round, Opaque

8.5 mm (calibrated)

$ 33.86

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1.79ct Brown Tourmaline, Oval, VVS

8.4 x 7.1 mm

$ 208.00

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0.70ct Multicolor Opal, Marquise, Transparent

11.4 x 4.6 mm

$ 31.37

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0.56ct Multicolor Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 16.73

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1.43ct Multicolor Opal, Oval, Translucent

9 x 7 mm (calibrated)

$ 47.00

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6.10ct Multicolor Boulder Opal, Pear Shape, Opaque

19.2 x 11.8 mm

$ 42.53

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4.06ct Multicolor Black Opal, Trillion, Opaque

13.7 x 13.1 mm

$ 121.31

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8.61ct Multicolor Black Opal, Oval, Opaque

19.2 x 12.9 mm

$ 357.32

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3.39ct Multicolor Opal Triplet, Fancy, Opaque

15.6 x 9.1 mm

$ 84.41

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6.47ct Pink Cat'S Eye Tourmaline, Oval, Translucent

11.5 x 9.3 mm

$ 966.62

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21.09ct Multicolor Opal, Oval, Transparent

25.4 x 16.5 mm

$ 525.14

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1.59ct Green Tourmaline, Emerald Cut, VS

14.4 x 3.9 mm

$ 43.56

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1.39ct Green Tourmaline, Emerald Cut, VVS

13.1 x 3.7 mm

$ 38.08

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1.99ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 87.21

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3.45ct Multicolor Opal, Oval, Transparent

14 x 9 mm (calibrated)

$ 86.74

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3.26ct Multicolor Opal Triplet, Fancy, Opaque

15.6 x 9.2 mm

$ 81.17

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0.69ct Yellow Tourmaline, Round, Transparent

5 mm (calibrated)

$ 13.74

View Gem
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Why Buy October Birthstones from GemSelect?

Shop Loose October Birthstones

October is one of the most colorful birthstone months, represented by both opal and tourmaline. Together, these gems offer a wide range of looks, from opal’s shifting play-of-color to tourmaline’s broad spectrum of pink, green, blue and multi-color varieties. This category brings together loose October birthstones for customers choosing gems for jewelry designs, personal collections or birthday gifts.

Opal: A Distinctive October Gem

Opal is loved for its unique optical character. Many opals display flashes of color that can change as the stone moves, making each gem visually individual. Loose opals are popular for pendants, earrings, rings and one-of-a-kind jewelry pieces where the gemstone can be the main focus of the design.

Tourmaline: Colorful and Versatile

Tourmaline is another traditional October birthstone and is valued for its impressive color variety. Pink tourmaline is especially popular for October jewelry, while green, blue and bi-color tourmalines give shoppers many design options. Its range of shapes and colors makes tourmaline a versatile choice for custom gemstone jewelry.

Loose opal and tourmaline October birthstones

Choosing Between Opal and Tourmaline

If you want a gemstone with dramatic color movement and an organic, artistic appearance, opal is a beautiful choice. If you prefer a more classic faceted gemstone with vivid body color, tourmaline may be the better fit. Many customers also combine both October birthstones in a custom design to celebrate the full personality of the month.

Buying Loose October Birthstones

When selecting a loose gemstone, consider the intended jewelry style, setting type, color preference, shape and size. Opals are often chosen for their pattern and color play, while tourmalines are commonly selected by hue, clarity, cut and overall brilliance. Review each gemstone’s individual details before purchasing, as natural gems can vary significantly from stone to stone.

October Birthstone FAQs

What are the birthstones for October?

The traditional October birthstones are opal and tourmaline. Both are widely used in birthstone jewelry and offer very different visual styles.

Is opal or tourmaline better for October jewelry?

Neither is universally better; it depends on the design and personal preference. Opal is chosen for its distinctive play-of-color, while tourmaline is chosen for its wide color range and faceted gemstone appeal.

What color is the October birthstone?

October birthstones are not limited to one color. Opal can show many shifting colors, while tourmaline occurs in a broad range that includes pink, green, blue and multi-color gems.

Can I use loose October birthstones for custom jewelry?

Yes. Loose opal and tourmaline gemstones are commonly selected for custom rings, pendants, earrings and other personalized jewelry designs. Always choose a setting style appropriate for the specific gem.

Are natural October birthstones good gifts?

Natural loose opal and tourmaline can make meaningful gifts for October birthdays, anniversaries or personal milestones, especially when selected in the recipient’s favorite color or jewelry style.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Maneuvering through the website was easy and enjoyable. I have ordered from GemSelect before and that experience was also pleasant.

Posted By Willow in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

My whole experience is great.

Posted By Ghs in November, 2025
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Overall Rating -> 10 star ratings

It was great

Posted By Nik in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
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Overall Rating -> 10 star ratings

The process was pleasant, I chose to purchase the stone traditional to the month of March as it is the month in which I was born.

Posted By Maharishi in June, 2026
Source: Bizrate
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