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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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0.66ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 10.96

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1.59ct Multicolor Opal Doublet, Pear Shape, Opaque

12 x 8 mm (calibrated)

$ 47.24

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0.89ct Multicolor Opal, Round, Opaque

7 mm (calibrated)

$ 29.25

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38.88ct Green Opal, Oval, Opaque

25.1 x 20.8 mm

$ 90.20

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3.92ct Multicolor Opal Triplet, Fancy, Opaque

14.1 x 11 mm

$ 97.61

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1.44ct Green Tourmaline, Emerald Cut, VVS-VS

20.7 x 3 mm

$ 48.60

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14.40ct Multicolor Boulder Opal, Cushion, Translucent

18.4 x 16.2 mm

$ 100.40

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1.64ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 59.89

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0.95ct Green Tourmaline, Baguette, VVS

7.6 x 4.1 mm

$ 33.12

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8.10ct Multicolor Boulder Opal, Fancy, Opaque

21.3 x 12.1 mm

$ 40.34

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2.27ct Green Tourmaline, Emerald Cut, VVS

26.3 x 3.3 mm

$ 56.52

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0.64ct Multicolor Black Opal, Marquise, Translucent

9.9 x 4.8 mm

$ 16.17

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9.41ct Multicolor Boulder Opal, Cushion, Opaque

13.7 x 10.9 mm

$ 46.86

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0.72ct Multicolor Opal, Oval, Opaque

7.7 x 5.9 mm

$ 21.51

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0.49ct Multicolor Opal, Fancy, Translucent

8.4 x 5.8 mm

$ 11.39

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1.51ctw Multicolor Opal, Oval, Transparent

7 x 5 mm (calibrated)

$ 66.18

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13.28ct Multicolor Boulder Opal, Pear Shape, Opaque

26.7 x 13.9 mm

$ 66.13

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0.84ct Green Tourmaline, Emerald Cut, VS

7.7 x 3.4 mm

$ 41.83

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0.92ct Pink Tourmaline, Oval, Transparent

5.9 x 5 mm

$ 13.99

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0.79ct Green Tourmaline, Oval, Transparent

6.2 x 4.9 mm

$ 13.10

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0.95ct Pink Tourmaline, Round, Transparent

6 mm (calibrated)

$ 15.75

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1.11ct Multicolor Opal, Oval, Opaque

8 x 6 mm (calibrated)

$ 33.17

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8.97ct Black Tourmaline, Emerald Cut, Opaque

15 x 10 mm (calibrated)

$ 44.67

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2.77ct Green Tourmaline, Emerald Cut, VS

22.9 x 3.7 mm

$ 75.88

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

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Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
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Overall Rating -> 10 star ratings

I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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Overall Rating -> 9 star ratings

The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.

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