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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
Cabochons
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3.88ctw Multicolor Black Opal, Oval, Translucent

11.3 x 8.3 mm

$ 97.57

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6.77ct Black Tourmaline, Emerald Cut, Opaque

13 x 9 mm (calibrated)

$ 33.71

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2.13ct Multicolor Black Opal, Oval, Opaque

12.2 x 7.7 mm

$ 70.72

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1.10ctw Multicolor Opal Doublet, Pear Shape, Opaque

8 x 5 mm (calibrated)

$ 32.68

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0.67ct Green Tourmaline, Baguette, VVS

11.9 x 2.7 mm

$ 23.36

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11.50ct Multicolor Opal Triplet, Fancy, Opaque

20.5 x 16.6 mm

$ 286.35

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0.34ct Multicolor Opal, Oval, Opaque

7 x 5 mm (calibrated)

$ 10.16

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0.83ct Pink Tourmaline, Oval, Transparent

6 x 4.9 mm

$ 33.07

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3.00ct Multicolor Opal, Trillion, Translucent

12 x 11 mm

$ 66.28

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1.60ct Green Tourmaline, Emerald Cut, VS

13.3 x 4 mm

$ 52.59

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1.12ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 18.57

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2.03ct Multicolor Opal Triplet, Oval, Opaque

11 x 9 mm (calibrated)

$ 50.55

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1.37ct Pink Tourmaline, Emerald Cut, VVS-VS

9.2 x 4.1 mm

$ 103.57

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2.94ct Multicolor Opal, Oval, Transparent

14 x 10 mm (calibrated)

$ 73.94

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2.03ct Yellow Tourmaline, Round, Transparent

7 mm (calibrated)

$ 33.65

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3.89ct Multicolor Opal, Oval, Transparent

14.5 x 10.8 mm

$ 81.49

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1.10ct Multicolor Opal, Oval, Translucent

10 x 8 mm (calibrated)

$ 42.62

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7.72ct Multicolor Boulder Opal, Fancy, Opaque

22.4 x 13.4 mm

$ 32.04

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3.82ct Multicolor Opal Triplet, Oval, Opaque

14 x 10 mm (calibrated)

$ 95.12

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1.10ct Pink Tourmaline, Emerald Cut, VVS

9.9 x 4.1 mm

$ 72.31

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5.00ct Multicolor Opal, Pear Shape, Transparent

13 x 11 mm (calibrated)

$ 124.50

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1.25ct Pink Tourmaline, Emerald Cut, VVS

10.7 x 3.7 mm

$ 94.50

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3.16ctw White Opal, Oval, Transparent

10 x 8 mm (calibrated)

$ 78.68

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1.71ct Pink Tourmaline, Oval, Transparent

9 x 7 mm (calibrated)

$ 28.34

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 -> 8 star ratings

It was fine

Posted By Na in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future

Posted By Liz in June, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.

Posted By Ktreva52 in June, 2026
Source: Bizrate

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Very neat and to the point

Posted By Botha in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways

Posted By The homie edgar in December, 2025
Source: Bizrate
Enlarged Gemstone Image