Natural Precious Opal Stones

Natural precious opal stones display a shifting rainbow of spectral colors that dance across their polished cabochon surfaces with every movement. Sourced directly from Australia’s famous outback mining fields, our collection features solid black, boulder, crystal, and light white opals. Every polished loose stone is guaranteed natural and untreated.

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Large Koroit Boulder Opal Pendant 83ct

AU$498
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1.3ct Natural Crystal Opal Lightning Ridge

AU$491
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92.35ct Natural Koroit Boulder Opal Large Teardrop

AU$470
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37ct Koroit boulder opal pendant showing detailed ironstone matrix pattern
37ct Koroit boulder opal pendant held on finger showing detailed natural ironstone pattern
Select options This product has multiple variants. The options may be chosen on the product page

37ct Koroit Boulder Opal Pendant

AU$463
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0.83ct Natural Black Opal Lightning Ridge

AU$463
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3.62ct Natural Crystal Boulder Opal

AU$463
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4.72ct Natural Dark Opal – Half Moon Multicolor

AU$455
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3.4ct Natural Boulder Opal Deep Blue Fire

AU$455
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Blue Winton Boulder Opal 5 ct

AU$455
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5.38ct Natural Crystal Boulder Opal

AU$455
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1.06 ct Dark Opal Heart

AU$455
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Koroit Boulder Opal Pendant 48ct

AU$455
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3.91ct Natural Boulder Opal Blue Fire

AU$427
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4.53ct Natural Crystal Boulder Opal

AU$427
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3.91ct Natural Crystal Boulder Opal

AU$427
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3.5ct Natural Crystal Boulder Opal

AU$427
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2.26ct Crystal Boulder Opal

AU$420
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1.2ct Natural Crystal Opal Lightning Ridge

Original price was: AU$527.Current price is: AU$420.
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26.81ct Double Sided Vein Australian Koroit Boulder Opal

AU$413
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4.14ct Natural Dark Opal Teardrop Green Blue

Original price was: AU$455.Current price is: AU$410.

Choosing and Valuing Natural Precious Opal Stones

To evaluate and choose a loose precious opal, buyers must understand the primary value factors. The background darkness, or body tone, is the foundation, with darker body tones (such as black and dark opals) making colors appear more intense and command higher prices. The play of color brightness is equally critical; a brilliant stone displays intense fire even in dim, indoor lighting conditions.

The spectral color range also dictates value, with red being the rarest and most expensive hue, followed by orange, green, and blue. To find comprehensive tips, please consult our how to buy Australian opals technical guide to learn about patterns and body tone scales. Whether sourcing for custom jewelry or building a long term collector portfolio, our ethically sourced, hand selected loose stones offer exceptional quality and value.

Frequently Asked Questions

What defines a precious opal stone?

Precious opal is defined by its ability to diffract light into a vibrant play of color, which common opal lacks.

Where are your precious stones mined?

Our stones are sourced directly from premier Australian fields including Lightning Ridge, Winton, and Coober Pedy.

What shapes are these stones cut into?

We offer classic oval cabochons alongside organic freeform shapes that preserve natural carat weight.

Are these loose stones calibrated?

We offer both standardized calibrated stones for standard mounts and unique freeform pieces.

Can I request custom video clips of these stones?

No, our professional 4K videos already show each stone under optimized neutral light conditions.