Loose Crystal Boulder Opal

Loose crystal boulder opals exhibit an elegant, glassy depth where brilliant, neon spectral colors appear to float in a translucent silica layer directly above natural ironstone. Sourced directly from Queensland mines, these single loose stones combine the luminous clarity of crystal with the structural durability of an ironstone base. Every loose crystal boulder opal in our collection is solid and untreated.

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2.04ct Crystal Boulder Opal

307
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2.06ct Natural Crystal Boulder Opal

307
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3.62ct Natural Crystal Boulder Opal

285
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5.38ct Natural Crystal Boulder Opal

281
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4.53ct Natural Crystal Boulder Opal

263
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3.91ct Natural Crystal Boulder Opal

263
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3.5ct Natural Crystal Boulder Opal

263
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2.26ct Crystal Boulder Opal

259
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1.48ct Crystal Boulder Opal

241
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3.29ct Crystal Opal

241
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2ct Crystal Boulder Opal

241
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1.47ct Crystal Boulder Opal

219
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25.1ct Natural Crystal Boulder Opal

219
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1.53ct Crystal Opal Green Blue Fire

202
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4.68ct Natural Crystal Boulder Opal

202
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1.4ct Crystal Opal Green Purple Blue

193
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1.78ct Crystal Opal Green Blue Fire

193
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5.6ct Natural Crystal Boulder Opal

162
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6.99ct Natural Crystal Boulder Opal

123
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1.2ct Crystal Boulder Opal

88

Translucent Elegance on a Sturdy Natural Backing

Mined in the Queensland boulder fields, these single loose stones combine the clarity of crystal with the strength of a dark ironstone base. Check our opal certificates page to review professional gemological validation.10

Frequently Asked Questions

What is a loose crystal boulder opal?

It is a single unset crystal boulder opal gemstone, ready for custom jewelry mounting or collecting.

How is crystal boulder opal different from standard boulder opal?

Crystal boulder forms primarily in light sandstone cavities, creating a transparent, glassy appearance.

What setting works best for crystal boulder opal?

Bezel settings in yellow gold or platinum trap light to enhance internal depth and color brilliance.