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Opal Gemstones - Certified Loose Opals - Buy Now

Opal gemstones at GemSelect, where vibrant play-of-color meets exceptional quality. Our collection features certified black opals, fire opals, boulder opals, and more, available in shapes like oval, pear, and round. Perfect for jewelry or collecting, our loose opals range from $10 to over $1000, all in stock with global shipping. For detailed insights, check out our opal information page.

Opal Weight
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Size Explained

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For Example: 8-9
Bi-color
Black Opal
Blue
Brown Opal
Golden Opal
Gray
Green Opal
Multicolor Opal
Orange Opal
Pink
Purple
Red
Turquoise
Violet
White Opal
Yellow Opal
Single
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Lots
Faceted
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10.30ct Multicolor Boulder Opal, Oval, Opaque

22.6 x 15.6 mm

$ 61.80

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8.06ct Multicolor Boulder Opal, Oval, Opaque

16.8 x 11.8 mm

$ 74.47

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12.46ct Warm Green Opal, Oval, Opaque

18 x 13.7 mm

$ 26.79

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25.69ct Multicolor Boulder Opal, Fancy, Opaque

25.7 x 15.7 mm

$ 154.14

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0.56ct Multicolor Opal, Oval, Opaque

7 x 5 mm (calibrated)

$ 20.16

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1.18ct Multicolor Opal, Oval, Opaque

9 x 7 mm (calibrated)

$ 42.48

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9.66ct Multicolor Opal, Oval, Translucent

18 x 13 mm (calibrated)

$ 466.69

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2.70ct Pale Yellow Cat's Eye Opal, Oval, Opaque

12 x 8 mm (calibrated)

$ 9.72

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11.42ct Multicolor Boulder Opal, Fancy, Transparent

21.7 x 18.6 mm

$ 68.52

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24.99ct Multicolor Opal, Oval, Opaque

31 x 20.1 mm

$ 89.96

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0.73ct Multicolor Opal, Oval, Opaque

6.8 x 5.5 mm

$ 26.28

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7.72ct Multicolor Boulder Opal, Fancy, Opaque

22.4 x 13.4 mm

$ 38.60

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10.65ct Multicolor Boulder Opal, Fancy, Opaque

20.2 x 13.2 mm

$ 63.90

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33.35ct Multicolor Boulder Opal, Fancy, Opaque

46.8 x 19.5 mm

$ 200.10

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10.71ct Multicolor Boulder Opal, Fancy, Opaque

24.8 x 15.2 mm

$ 64.26

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1.48ctw Multicolor Opal, Oval, Transparent

8 x 6 mm (calibrated)

$ 444.00

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0.95ct Multicolor Opal, Marquise, Transparent

10.1 x 5.3 mm

$ 43.90

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1.36ct Multicolor Opal, Oval, Transparent

9 x 7 mm (calibrated)

$ 39.05

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20.82ct Earth Green Opal, Oval, Opaque

21 x 17 mm

$ 53.71

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0.56ct Multicolor Opal, Pear Shape, Transparent

7 x 5 mm (calibrated)

$ 16.80

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2.29ct Multicolor Black Opal, Oval, Opaque

11 x 9 mm (calibrated)

$ 91.60

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22.64ct Multicolor Boulder Opal, Oval, Opaque

30.5 x 13.4 mm

$ 135.84

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3.82ctw Fire Orange Opal, Oval, Transparent

8.1 x 6.3 mm

$ 136.80

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10.37ct Earth Green Opal, Oval, Opaque

18 x 13 mm (calibrated)

$ 27.53

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Why Buy Opal from GemSelect?

Why Choose GemSelect for Opal Gemstones?

  • Certified Quality: All our opals are natural and certified, ensuring authenticity and value.
  • Diverse Selection: From black opal gemstones to fire opal gemstones, we offer a variety of types and colors.
  • Competitive Pricing: Find opal stones for every budget, from affordable to high-end.
  • Global Delivery: Enjoy secure worldwide shipping for all loose opals.
  • Expert Guidance: Our detailed descriptions and opal grading information help you make informed choices.

Explore related gemstones like moonstone, amethyst, or labradorite for complementary additions to your collection, or dive deeper into the world of precious opals to discover their unique charm.

Opal Gemstones for jewelry making and Collecting

Frequently Asked Questions About Opal Gemstones

What are the main types of opal gemstones available?

At GemSelect, we offer a variety of opal gemstones, including black opal, known for its dark body tone and vibrant play-of-color; fire opal, prized for its warm orange to red hues; boulder opal, featuring natural matrix patterns; Ethiopian opal, celebrated for its affordability and bright colors; and white opal, with a lighter base tone. Each type offers unique aesthetics for jewelry designs or gemstone collecting.

How do I know if an opal is natural or treated?

Natural opals typically display organic inclusions and imperfections, while treated opals, such as opal doublets or opal triplets, may have enhanced layers for durability or appearance. At GemSelect, all our loose opals are certified, and any treatments are clearly disclosed in the product details to ensure transparency and trust.

What is the price range for opal gemstones?

Our opal gemstones range from as low as $10 for smaller or more common stones, such as Ethiopian opals, to over $1000 for rare, high-quality black opals or Australian opals. Prices vary based on size, play-of-color, clarity, and origin, catering to every budget.

Are opal gemstones suitable for everyday jewelry?

Opal gemstones, with a Mohs hardness of 5.5-6.5, are relatively soft, making them best suited for jewelry like pendants, earrings, or occasional-wear rings. To maintain their beauty, avoid exposure to heat, chemicals, or rough handling. Our opal cabochons and loose opals are ideal for custom designs with proper care.

How should I care for my opal gemstones?

To preserve your opal gemstones, clean them gently with a soft, damp cloth and mild soap, avoiding harsh chemicals or ultrasonic cleaners. Store loose opals separately to prevent scratches, especially for delicate types like fire opal or Ethiopian opal, and keep them away from extreme heat to maintain their play-of-color and opal grading.

Why are Australian opals so highly valued?

Australian opals, particularly black opals from Lightning Ridge, are prized for their intense play-of-color and dark body tone, which enhances their visual appeal. Their rarity and exceptional quality make them a top choice for luxury jewelry and gemstone collectors worldwide.

What is an opal cabochon, and why is it popular?

An opal cabochon is a polished, non-faceted gem with a smooth, rounded surface that highlights the stone’s play-of-color. This cut is popular for opal jewelry because it showcases the gem’s natural beauty, making it a favorite for custom opal rings, pendants, and earrings.

Can I use opal gemstones for engagement rings?

While opal gemstones are stunning, their softness (5.5-6.5 on the Mohs scale) makes them less ideal for daily-wear engagement rings. For durability, consider pairing opals with harder gemstones like sapphire or setting them in protective designs. Our loose opals are perfect for creating unique, special-occasion rings.

How does GemSelect ensure the quality of its opal gemstones?

Every opal gemstone at GemSelect is carefully inspected and certified for authenticity. We provide detailed descriptions, including opal grading, origin, and any treatments, ensuring you receive high-quality natural opals for your jewelry or collection.

Are opal doublets and triplets worth buying?

Opal doublets and opal triplets are more affordable alternatives to solid natural opals, offering similar visual appeal with a thin layer of opal backed or capped for stability. They’re excellent for budget-conscious buyers looking for vibrant play-of-color in jewelry designs.

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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
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Overall Rating -> 10 star ratings

Very surprised how quick and efficient it was to checkout and pay. Also found exactly what I was looking for no issues.

Posted By Watson in May, 2025
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Overall Rating -> 10 star ratings

It was my second time so I understand what it is to do

Posted By Ibie in February, 2025
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Overall Rating -> 9 star ratings

I wish there were options for jewelry settings

Posted By Tim in May, 2025
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Overall Rating -> 9 star ratings

I love wide range of stones. Always have my preference.

Posted By Ray in April, 2025
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Overall Rating -> 10 star ratings

A pleasant experience and many choices to choose from

Posted By Krackenking in November, 2025
Source: Bizrate
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