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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
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Lots
Faceted
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2.44ct Green Tourmaline, Emerald Cut, VVS

18 x 3.9 mm

$ 66.83

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2.98ct Pink Tourmaline, Emerald Cut, VVS-VS

8.9 x 6.5 mm

$ 225.28

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2.69ct Green Tourmaline, Emerald Cut, VVS-VS

24.9 x 3.7 mm

$ 103.15

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0.74ct Green Tourmaline, Baguette, VS

6.6 x 3.9 mm

$ 25.80

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2.95ct Multicolor Boulder Opal, Pear Shape, Opaque

11.5 x 8.5 mm

$ 12.24

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10.82ct Multicolor Opal, Trillion, Opaque

15.9 x 15.3 mm

$ 269.42

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0.54ct Orange Fire Opal, Oval, Translucent

8 x 6 mm (calibrated)

$ 12.33

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1.44ct Green Tourmaline, Oval, Transparent

7 x 5.7 mm

$ 23.86

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1.00ct Green Tourmaline, Oval, VS

7.8 x 5.6 mm

$ 41.50

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13.29ct Multicolor Boulder Opal, Fancy, Opaque

21.7 x 13.6 mm

$ 66.18

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1.54ct Green Tourmaline, Emerald Cut, VVS-VS

16.2 x 3.7 mm

$ 38.35

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0.61ct Multicolor Opal, Oval, Opaque

7 x 5 mm (calibrated)

$ 18.23

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2.01ct Green Tourmaline, Flower Cut, Translucent

10 x 8 mm (calibrated)

$ 18.35

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0.94ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 257.47

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1.35ct Multicolor Opal, Marquise, Transparent

13.9 x 6.6 mm

$ 59.16

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1.34ctw Multicolor Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 40.04

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0.75ct Green Tourmaline, Emerald Cut, VS-SI

6.4 x 4.4 mm

$ 37.35

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33.04ctw Bi-Color Tourmaline, Fancy, Transparent

21 x 17.9 mm

$ 330.40

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6.53ctw Green Tourmaline, Briolette, VS-SI

6 x 4 mm (calibrated)

$ 104.48

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1.11ct Multicolor Opal, Oval, Opaque

10 x 8 mm (calibrated)

$ 33.17

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0.99ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 271.16

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1.21ct Red Tourmaline, Oval, Transparent

7.1 x 5.6 mm

$ 20.05

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0.91ct Multicolor Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 27.19

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4.26ct Multicolor Black Opal, Round, Opaque

12 mm (calibrated)

$ 124.11

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 -> 9 star ratings

Easy to use. Many options to find the right gemstone

Posted By Liz in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

The website has a good selection, the interface is very intuitive.

Posted By PhoenixFeatherJewelry in January, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

It was great! Great photos

Posted By Marcia in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Fairly good selection of calibrated gems but would like to see more in various sizes, esp rounds,

Posted By Eddie in August, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Easy to use website

Posted By Mel in February, 2026
Source: Bizrate
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