Natural Australian Opal Specimen

Natural Australian opal specimens exhibit the raw, rugged beauty of precious opal preserved within its original host matrix. Cut and polished to expose internal color bars while retaining organic rock structures, these specimens are highly prized by mineral collectors, geologists, and home decor enthusiasts. Every specimen in our collection is 100 percent natural and untreated.

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Absolute Gem Rare Harlequin Boulder Opal 14.7 ct

AU$89,837
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168.3ct Natural Boulder Opal Specimen

AU$2,898
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145ct Yowah Boulder Opal Specimen

AU$1,855
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29.45ct Natural Boulder Opal Large

AU$1,616
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54.2ct Natural Boulder Opal Large

AU$1,391
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41ct Natural Koroit Boulder Opal

AU$1,355
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146.94ct Large Natural Koroit Boulder Opal

AU$717
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92.35ct Natural Koroit Boulder Opal Large Teardrop

AU$478

Raw Outback Geological Art for Collectors

Sourced directly from famous fields such as Winton, Koroit, and Lightning Ridge, these specimens show how precious opal forms in cracks and layers. They represent a spectacular intersection of geology and gemstone value. Read about our strict policy guidelines on our returns and refunds page.

Frequently Asked Questions

What is an opal specimen?

It is a raw or partially polished natural stone showing precious opal still embedded in its host rock.

Can specimen opals be set in jewelry?

Some small, stable pieces can be set, but most are kept as display specimens for collectors.

What is the return policy for mineral specimens?

Like rough parcels, specimen stones are final sale items and are not eligible for returns or refunds.