Shop Loose Boulder Opal: Cabochons, Natural Boulder Opal for Jewelry
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Discover our stunning collection of loose boulder opal gemstones, sourced from the finest Australian boulder opal origins. Known for their vibrant boulder opal colors and unique patterns, these gems make an exceptional choice for custom boulder opal jewelry. Choose from raw boulder opal, polished stones, or beautifully cut boulder opal cabochons to suit your design needs. Whether you're drawn to the natural beauty or the deep meaning and value of these gems, our selection offers a diverse range of options. |
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Bi-color
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Black
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Blue
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Brown
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Golden
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Gray
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Green
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Multicolor Boulder Opal
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Orange
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Pink
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Purple
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Red
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Turquoise
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Violet
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White
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
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| ID: | 634607 |
| Weight: | 12.07ct |
| Size: | 27.4 x 9.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 101.39 |
| Item in Stock | |
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| ID: | 523722 |
| Weight: | 33.71ct |
| Size: | 32.6 x 22.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 222.49 |
| Item in Stock | |
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| ID: | 300453 |
| Weight: | 28.58ct |
| Size: | 23.1 x 18.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 240.07 |
| Item in Stock | |
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| ID: | 410119 |
| Weight: | 34.16ct |
| Size: | 23.4 x 19.6 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 316.10 |
| Item in Stock | |
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| ID: | 322037 |
| Weight: | 42.73ct |
| Size: | 27 x 20 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 394.82 |
| Item in Stock | |
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| ID: | 635341 |
| Weight: | 25.30ct |
| Size: | 29.7 x 13.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 212.52 |
| Item in Stock | |
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| ID: | 523672 |
| Weight: | 30.50ct |
| Size: | 30 x 22 mm (calibrated) |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 201.30 |
| Item in Stock | |
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| ID: | 521754 |
| Weight: | 30.94ct |
| Size: | 25.4 x 20.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 204.20 |
| Item in Stock | |
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| ID: | 678766 |
| Weight: | 21.16ct |
| Size: | 25.6 x 16.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 126.96 |
| Item in Stock | |
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| ID: | 626298 |
| Weight: | 21.39ct |
| Size: | 16 x 16 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 197.64 |
| Item in Stock | |
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| ID: | 575226 |
| Weight: | 35.99ct |
| Size: | 45 x 23.8 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 129.56 |
| Item in Stock | |
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| ID: | 627639 |
| Weight: | 21.82ct |
| Size: | 20.7 x 16.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 201.61 |
| Item in Stock | |
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| ID: | 679248 |
| Weight: | 20.10ct |
| Size: | 21.1 x 16.6 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 120.60 |
| Item in Stock | |
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| ID: | 679214 |
| Weight: | 19.33ct |
| Size: | 26 x 15.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 115.98 |
| Item in Stock | |
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| ID: | 522410 |
| Weight: | 20.80ct |
| Size: | 32.3 x 16.8 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 137.28 |
| Item in Stock | |
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| ID: | 522985 |
| Weight: | 41.37ct |
| Size: | 30 x 22 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 273.05 |
| Item in Stock | |
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| ID: | 575232 |
| Weight: | 35.80ct |
| Size: | 36.6 x 19.7 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 141.77 |
| Item in Stock | |
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| ID: | 522986 |
| Weight: | 20.55ct |
| Size: | 31.9 x 16.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 135.64 |
| Item in Stock | |
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| ID: | 628050 |
| Weight: | 17.73ct |
| Size: | 23.7 x 15.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 106.38 |
| Item in Stock | |
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| ID: | 521759 |
| Weight: | 26.43ct |
| Size: | 28.5 x 17.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 174.44 |
| Item in Stock | |
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| ID: | 636150 |
| Weight: | 14.98ct |
| Size: | 20.2 x 13.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 104.86 |
| Item in Stock | |
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| ID: | 523720 |
| Weight: | 17.29ct |
| Size: | 27 x 17.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 114.12 |
| Item in Stock | |
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| ID: | 522982 |
| Weight: | 17.03ct |
| Size: | 26.9 x 13.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 112.40 |
| Item in Stock | |
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| ID: | 628411 |
| Weight: | 16.81ct |
| Size: | 28.8 x 13.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 100.86 |
| Item in Stock | |
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| ID: | 678676 |
| Weight: | 23.38ct |
| Size: | 25.3 x 16.7 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 140.28 |
| Item in Stock | |
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| ID: | 627837 |
| Weight: | 28.09ct |
| Size: | 27 x 20 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 259.55 |
| Item in Stock | |
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| ID: | 628027 |
| Weight: | 15.88ct |
| Size: | 23.1 x 12.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 133.39 |
| Item in Stock | |
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| ID: | 628406 |
| Weight: | 24.07ct |
| Size: | 22.2 x 18.7 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 144.42 |
| Item in Stock | |
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| ID: | 523676 |
| Weight: | 19.94ct |
| Size: | 36.4 x 16.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 131.60 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 521765 |
| Weight: | 25.75ct |
| Size: | 21 x 18.4 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 169.96 |
| Item in Stock | |
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| ID: | 634610 |
| Weight: | 22.12ct |
| Size: | 27.5 x 12.8 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 185.81 |
| Item in Stock | |
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| ID: | 635335 |
| Weight: | 14.55ct |
| Size: | 26.3 x 11.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 122.22 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 629938 |
| Weight: | 6.10ct |
| Size: | 19.2 x 11.8 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 51.24 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 628049 |
| Weight: | 7.58ct |
| Size: | 18 x 9.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 45.48 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 679222 |
| Weight: | 5.77ct |
| Size: | 18.1 x 11.1 mm |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 34.62 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 523156 |
| Weight: | 16.01ct |
| Size: | 30.6 x 12.4 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 105.67 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 628054 |
| Weight: | 11.28ct |
| Size: | 23.7 x 8.7 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 67.68 |
| Item in Stock | |
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| ID: | 679240 |
| Weight: | 14.45ct |
| Size: | 20 x 15 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 86.70 |
| Item in Stock | |
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| ID: | 635334 |
| Weight: | 11.03ct |
| Size: | 22.7 x 12.8 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 92.65 |
| Item in Stock | |
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| ID: | 718513 |
| Weight: | 17.99ct |
| Size: | 9.7 x 17.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 107.94 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 718505 |
| Weight: | 40.81ct |
| Size: | 34.3 x 24.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 244.86 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 627861 |
| Weight: | 10.97ct |
| Size: | 17 x 11.4 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 65.82 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 523733 |
| Weight: | 13.23ct |
| Size: | 22.8 x 14 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 87.32 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 679144 |
| Weight: | 21.69ct |
| Size: | 23.8 x 14.7 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 130.14 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 628393 |
| Weight: | 10.65ct |
| Size: | 20.2 x 13.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 63.90 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 678775 |
| Weight: | 9.41ct |
| Size: | 13.7 x 10.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 56.46 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 678873 |
| Weight: | 11.00ct |
| Size: | 22.3 x 11.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 66.00 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 302922 |
| Weight: | 32.39ct |
| Size: | 33.7 x 15 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 299.28 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 302919 |
| Weight: | 7.81ct |
| Size: | 16.4 x 10.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 72.17 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 300454 |
| Weight: | 20.92ct |
| Size: | 25.5 x 14.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 193.30 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 521760 |
| Weight: | 14.46ct |
| Size: | 23.6 x 13 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 95.44 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 634615 |
| Weight: | 14.40ct |
| Size: | 18.4 x 16.2 mm |
| Clarity: | Translucent |
| Content: | 1 pc |
| Price: | $ 120.96 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 635340 |
| Weight: | 7.95ct |
| Size: | 18.3 x 9.9 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 66.78 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 718515 |
| Weight: | 40.27ct |
| Size: | 41.4 x 24.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 241.62 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 627858 |
| Weight: | 12.73ct |
| Size: | 16 x 16 mm (calibrated) |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 76.38 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 718507 |
| Weight: | 50.24ct |
| Size: | 32.3 x 24.3 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 301.44 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 679224 |
| Weight: | 8.10ct |
| Size: | 21.3 x 12.1 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 48.60 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 629217 |
| Weight: | 8.32ct |
| Size: | 18.8 x 10.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 69.89 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 628388 |
| Weight: | 18.63ct |
| Size: | 19.6 x 17.5 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 111.78 |
| Item in Stock | |
| More Options & Item Details | |
| ID: | 718508 |
| Weight: | 10.02ct |
| Size: | 20.8 x 14.2 mm |
| Clarity: | Opaque |
| Content: | 1 pc |
| Price: | $ 60.12 |
| Item in Stock | |
| More Options & Item Details | |
GemSelect Certified Store Reviews
GemSelect: Over 18 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.
Posted By G.W. in June, 2025
Source: Bizrate
Overall Rating -> 9 
Been using them for years! Very satisfied with the products.
Posted By PI SC in May, 2025
Source: Bizrate
Overall Rating -> 10
Easy to conduct search, good amount of stock to select from along with variety of prices.
Posted By Que in June, 2025
Source: Bizrate
Overall Rating -> 8 
great experience
Posted By T in December, 2024
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Overall Rating -> 9
I am very pleased with the ways you can filter your searches on this site, finding exactly what I want with little knowledge of what I am looking for is surprisingly easy!
Posted By Leo in March, 2025
Source: Bizrate
Overall Rating -> 10
Been really easy to navigate and choose options. Beautiful selection. Would love more videos.
Posted By Online Shopper in August, 2024
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Overall Rating -> 10
I have found GemSelect to have the best selections of quality stones at a reasonable price. I like the packaging and the report availability.
Posted By Sam in March, 2025
Source: Bizrate
Overall Rating -> 10
easy site to navigate
Posted By Curt's Cabochons in June, 2025
Source: Bizrate
Overall Rating -> 10
I searched for the size, dimensions and quality of the stones I was looking for and then compared and ordered.
Posted By Tim in March, 2025
Source: Bizrate
