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Boulder Opals for Sale

Boulder opal forms in seams through Queensland ironstone, and is cut with its host rock as a naturally dark backing — so its colour can rival black opal while every stone keeps a free, organic shape that no two pieces share.

We source boulder opal first-hand through the trade networks our family has built since 1956, and grade it with the same body-tone and brightness system as our Lightning Ridge stones. See the opal types guide for how boulder compares.

44 stones live in this category right now.

#288138 · BOULDER OPAL
81.55 ct
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#230717 · BOULDER OPAL
41.80 ct
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#288115 · BOULDER OPAL
59.64 ct
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#251308 · BOULDER OPAL
16.02 ct
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#230721 · BOULDER OPAL
18.87 ct
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#252812 · BOULDER OPAL
10.40 ct
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#252395 · BOULDER OPAL
13.96 ct (pair)
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#253101 · BOULDER OPAL
43.82 ct
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#288170 · BOULDER OPAL
3.97 ct
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#230785 · BOULDER OPAL
8.90 ct (pair)
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#253024 · BOULDER OPAL
2.90 ct (pair)
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#252597 · BOULDER OPAL
19.04 ct
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#251322 · BOULDER OPAL
5.17 ct
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#253043 · BOULDER OPAL
1.16 ct
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#252365 · BOULDER OPAL
21.80 ct
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#252959 · BOULDER OPAL
1.52 ct
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#288130 · BOULDER OPAL
3.28 ct
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#252815 · BOULDER OPAL
4.15 ct
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#253003 · BOULDER OPAL
7.25 ct
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#252785 · BOULDER OPAL
8.46 ct
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#252576 · BOULDER OPAL
4.08 ct
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#288135 · BOULDER OPAL
1.72 ct
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#252871 · BOULDER OPAL
1.09 ct
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#251319 · BOULDER OPAL
1.76 ct
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#252814 · BOULDER OPAL
7.05 ct
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#252436 · BOULDER OPAL
1.65 ct
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#252526 · BOULDER OPAL
3.95 ct
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#252929 · BOULDER OPAL
0.80 ct
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#230806 · BOULDER OPAL
2.35 ct
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#230653 · BOULDER OPAL
4.00 ct
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#252437 · BOULDER OPAL
1.15 ct
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#252591 · BOULDER OPAL
1.45 ct
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#252415 · BOULDER OPAL
1.37 ct
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#252924 · BOULDER OPAL
1.00 ct
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#230627 · BOULDER OPAL
10.27 ct (pair)
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#230637 · BOULDER OPAL
6.18 ct
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#252837 · BOULDER OPAL
2.63 ct
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#288153 · BOULDER OPAL
23.46 ct
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#230633 · BOULDER OPAL
3.83 ct
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#230683 · BOULDER OPAL
10.49 ct
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#253508 · BOULDER OPAL
21.61 ct (pair)
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#252872 · BOULDER OPAL
1.07 ct
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#288152 · BOULDER OPAL
21.60 ct (pair)
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#252463 · BOULDER OPAL
5.35 ct (pair)
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