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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (902): Opal Cabochons - Fire Opal, Opal, Opal Doublet, Boulder Opal, Chocolate Opal, Black Opal Clear All
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thumb image of 18.3ct Oval Cabochon Multicolor Opal (ID: 467270)
18.33 ct Opal
20 x 16.9 mm
$ 737.97
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1 pc
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thumb image of 1.6ct Cushion Cabochon Pink Opal (ID: 491419)
1.59 ct Opal
7.6 x 7.4 mm
$ 3.55
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4 pcs
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thumb image of 2.6ct Round Cabochon Yellow Opal (ID: 477542)
2.61 ctw Opal
6.1 mm
$ 55.62
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thumb image of 1.4ct Oval Cabochon Multicolor Black Opal (ID: 490702)
1.41 ct Black Opal
9 x 7.1 mm
$ 21.22
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4 pcs
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thumb image of 2.5ct Round Cabochon Yellow Opal (ID: 477459)
2.50 ctw Opal
6.1 mm
$ 53.28
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thumb image of 15.7ct Oval Cabochon Multicolor Opal (ID: 462134)
15.72 ct Opal
19.5 x 17.1 mm
$ 632.89
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thumb image of 1.9ct Oval Cabochon Pink Opal (ID: 491421)
1.92 ct Opal
9.9 x 6.9 mm
$ 4.28
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3 pcs
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thumb image of 0.9ct Oval Cabochon Yellow Opal (ID: 475547)
0.93 ctw Opal
6.1 x 4.2 mm
$ 19.70
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thumb image of 15.4ct Oval Cabochon Yellow Opal (ID: 462135)
15.44 ct Opal
18.8 x 15.7 mm
$ 621.61
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thumb image of 1.5ct Oval Cabochon Multicolor Black Opal (ID: 490388)
1.47 ct Black Opal
9.2 x 7.1 mm
$ 22.12
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thumb image of 2ct Oval Cabochon Pink Opal (ID: 491531)
2.03 ct Opal
9.1 x 7.3 mm
$ 4.53
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thumb image of 15.9ct Pear Cabochon Yellow Fire Opal (ID: 380406)
15.86 ct Fire Opal
28.8 x 14.2 mm
$ 342.73
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5 pcs
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thumb image of 2.7ct Oval Cabochon Multicolor Chocolate Opal (ID: 330691)
2.71 ctw Chocolate Opal
7 x 5.1 mm
$ 81.30
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thumb image of 15.4ct Pear Cabochon Multicolor Opal (ID: 462133)
15.39 ct Opal
22.8 x 17.9 mm
$ 619.60
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thumb image of 2.1ct Oval Cabochon Pink Opal (ID: 491435)
2.05 ct Opal
10.4 x 8.6 mm
$ 4.57
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thumb image of 1.2ct Pear Cabochon Yellow Opal (ID: 478643)
1.15 ct Opal
8.8 x 8.9 mm
$ 40.25
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4 pcs
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thumb image of 2.8ct Oval Cabochon Multicolor Chocolate Opal (ID: 330642)
2.83 ctw Chocolate Opal
7 x 5.1 mm
$ 84.90
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4 pcs
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thumb image of 2.5ct Oval Cabochon Multicolor Chocolate Opal (ID: 330688)
2.50 ctw Chocolate Opal
7 x 5.1 mm
$ 75.00
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4 pcs
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thumb image of 3ct Oval Cabochon Multicolor Chocolate Opal (ID: 330325)
3.00 ctw Chocolate Opal
7.9 x 6.1 mm
$ 90.00
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thumb image of 2.3ct Oval Cabochon Pink Opal (ID: 491533)
2.32 ct Opal
9.6 x 7.8 mm
$ 5.17
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4 pcs
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thumb image of 2.4ct Oval Cabochon Multicolor Chocolate Opal (ID: 330630)
2.39 ctw Chocolate Opal
7.1 x 5.1 mm
$ 71.70
Item in Stock
Opal Cabochons
More than any other gem, each opal is distinctly an individual. No other stone has as rich and varied a folklore. Opals are also the most delicate gems commonly worn. They require special care to ensure their health and longevity.

Opal's fire was long thought to be the result of iridescence. However, with the advent of scanning electron microscopes, we now know that it is a result of diffraction.

Opal is relatively soft, with a rating of 5.5-6.5 on the Mohs scale. Despite its frequent use in rings, opal is a poor choice for a ring stone; it is much better suited to earrings, pins, and pendants.

Major suppliers include Australia, Brazil, Mexico, and the US. Values are normally determined by the presence and nature of color flashes.
Certified Customer Reviews
Overall Rating -> 10 star ratings
Happy about the experience of the store, a lot of stone urge very nice
Posted By Ginger22 in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Great products, reasonably priced, always a great shopping experience
Posted By Cas Brown in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
good all is very good
Posted By Arocas in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Ease of selection- guarantee- honesty
Posted By Curt in April, 2018
Source: Bizrate
Overall Rating -> 8 star ratings
when I need a colored stone I check gem select. a trusted supplier for at least 10 years for me. many of the online sites have gone black but gemselect continues to satisfy me. oh sure there are many windowed and poorly cut stones here so paying some attention is critical. remember these are not custom cut stones but rather cut by old methods and the aim is to keep weight up at the expense of optical perfection. remember that colored stones are about color as the first consideration. I just wish gemselect offered rough for those who want to cut it.
Posted By Bis in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Wow, great site with clear, concise information that is provided in a very user-friendly interface. I feel lucky to have found this given I am about ready to ask my dream girl to marry me. Thanks!
Posted By JJ in April, 2018
Source: Bizrate
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart