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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (181): Round Opal Gems - Fire Opal, Moss Opal, Shop Opal at GemSelect, Opal Doublet, Boulder Opal, Chocolate Opal, Black Opal Clear All
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2 pcs
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4.7ct Round Cabochon Blue Opal Doublet Gem (ID: 391594)
4.68 ct (total 9.35ctw) Opal Doublet
15.2 mm
$ 207.10
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1 pc
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11.3ct Round Cabochon Multicolor Chocolate Opal Gem (ID: 450844)
11.31 ct Chocolate Opal
16.2 mm
$ 499.99
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4 pcs
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0.4ct Round Cabochon Yellow Opal Gem (ID: 477545)
0.36 ct (total 1.45ctw) Opal
5.1 mm
$ 30.90
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1 pc
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2.1ct Round Cabochon Multicolor Black Opal Gem (ID: 473782)
2.09 ct Black Opal
9 mm
$ 43.74
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2 pcs
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0.6ct Round Cabochon Yellow Opal Gem (ID: 477366)
0.60 ct (total 1.20ctw) Opal
5.9 mm
$ 25.57
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3 pcs
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0.6ct Round Cabochon Yellow Opal Gem (ID: 477316)
0.57 ct (total 1.72ctw) Opal
6.2 mm
$ 36.65
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4 pcs
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1.1ct Round Cabochon Multicolor Black Opal Gem (ID: 473745)
1.11 ct (total 4.42ctw) Black Opal
7.1 mm
$ 92.51
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6 pcs
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1.9ct Round Cabochon Multicolor Opal Gem (ID: 466391)
1.89 ct (total 11.36ctw) Opal
8.6 mm
$ 318.08
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4 pcs
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0.6ct Round Cabochon Yellow Opal Gem (ID: 477458)
0.57 ct (total 2.26ctw) Opal
6.1 mm
$ 48.16
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6 pcs
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1.7ct Round Cabochon Multicolor Opal Gem (ID: 466392)
1.67 ct (total 10.00ctw) Opal
8.2 mm
$ 280.00
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1 pc
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15.1ct Round Cabochon Multicolor Boulder Opal Gem (ID: 365231)
15.09 ct Boulder Opal
16.4 mm
$ 105.63
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1 pc
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15.8ct Round Cabochon Multicolor Boulder Opal Gem (ID: 336576)
15.80 ct Boulder Opal
18.6 mm
$ 110.60
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1 pc
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6.8ct Round Cabochon Multicolor Opal Gem (ID: 503151)
6.80 ct Opal
15.6 mm
$ 276.90
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4 pcs
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2.1ct Round Cabochon Multicolor Opal Gem (ID: 466305)
2.12 ct (total 8.47ctw) Opal
10 mm
$ 237.16
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1 pc
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23.5ct Round Cabochon Multicolor Boulder Opal Gem (ID: 302915)
23.48 ct Boulder Opal
21.3 mm
$ 164.36
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5 pcs
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1.7ct Round Cabochon Multicolor Opal Gem (ID: 466386)
1.68 ct (total 8.39ctw) Opal
8 mm
$ 234.92
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2 pcs
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0.7ct Round Cabochon White Opal Gem (ID: 477368)
0.65 ct (total 1.29ctw) Opal
6.1 mm
$ 27.49
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5 pcs
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1.7ct Round Cabochon Multicolor Opal Gem (ID: 466382)
1.67 ct (total 8.36ctw) Opal
8.1 mm
$ 234.08
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5 pcs
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0.4ct Round Cabochon Yellow Opal Gem (ID: 477568)
0.38 ct (total 1.92ctw) Opal
5.2 mm
$ 40.92
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1 pc
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1.2ct Diamond-Cut Reddish Orange Fire Opal Gem (ID: 369575)
1.22 ct Fire Opal
8.4 mm
$ 39.56
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1 pc
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1.2ct Round Cabochon Orange Opal Gem (ID: 478966)
1.21 ct Opal
7.9 mm
$ 32.13
Item in Stock
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Round Opal Gems
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.

Round opal gemstones are available in singles, matched pairs and gem lots. Round opal gems fit various jewelry designs, whether they are used as center stones or accent stones. Choose from various round opal stones in calibrated sizes, including black opal, boulder opal, chocolate opal and opal doublets. Use the search filters at the top of the page to find the perfect round opal gems by size, carat weight, price or origin. The tick boxes will direct you to singles, pairs, lots, faceted gems or cabs.
Certified Customer Reviews
Overall Rating -> 10 star ratings
This site always has beautiful stones to choose from and you will get the actual gem that is pictured. The shipping is fast and reasonably priced.
Posted By CAC in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have not gotten my gems, but when i do i will be very happy, yet i did not like you had to pay $15 extra for faster shipping
Posted By Jack in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect, personally. I browse their site almost daily to see all the new stones available. Their selection is pretty amazing. The quality isn't always the highest and the cut of the stones isn't always perfect. But for the price, and if you look hard enough, you can find a real gem, so to speak.
Posted By Patrick in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I would recommend to a friend because of the quality of the products purchased. The gemstone quality is very high and the gems purchased are beautiful. Any friends interested in having custom jewelry made would definitely be recommended to the site. Also, every shipment is handled with care and I am very pleased with that.
Posted By Isaiah in September, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
Gem Select has an excellent selection of gemstones, including some rare ones. Prices are as expected.
Posted By Mike in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Excelente proceso de compra!!
Posted By Mariana in September, 2018
Source: Bizrate
Popular Gemstones
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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

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