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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (1093): Oval Opal Gemstones - Fire Opal, Moss Opal, Opal, Opal Doublet, Boulder Opal, Chocolate Opal, Black Opal Clear All
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1ct Oval Facet Reddish Orange Fire Opal Gem (ID: 366894)
1.00 ct Fire Opal
8.3 x 6.6 mm
$ 39.00
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2 pcs
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0.9ct Oval Facet Orange Fire Opal Gem (ID: 453905)
0.94 ct (total 1.87ctw) Fire Opal
8 x 6.1 mm
$ 49.26
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1 pc
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2.6ct Oval Cabochon Pink Opal Gem (ID: 491437)
2.63 ct Opal
14 x 9.7 mm
$ 5.86
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2.4ct Oval Cabochon Multicolor Black Opal Gem (ID: 490382)
2.42 ct Black Opal
10.2 x 8.3 mm
$ 36.42
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5 pcs
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0.3ct Oval Facet Orange Fire Opal Gem (ID: 454467)
0.32 ct (total 1.60ctw) Fire Opal
6.6 x 4.9 mm
$ 42.14
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18.3ct Oval Cabochon Multicolor Opal Gem (ID: 467270)
18.33 ct Opal
20 x 16.9 mm
$ 737.97
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2 pcs
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0.9ct Oval Cabochon Orange Opal Gem (ID: 368605)
0.86 ct (total 1.71ctw) Opal
8.2 x 6.2 mm
$ 46.77
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2 pcs
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0.8ct Oval Facet Orange Fire Opal Gem (ID: 431972)
0.76 ct (total 1.51ctw) Fire Opal
8.2 x 6.2 mm
$ 40.15
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4 pcs
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0.4ct Oval Facet Multicolor Opal Gem (ID: 462488)
0.41 ct (total 1.63ctw) Opal
7 x 5.1 mm
$ 65.20
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17.3ct Oval Cabochon Multicolor Opal Gem (ID: 462093)
17.26 ct Opal
19.3 x 14.8 mm
$ 694.89
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1.9ct Oval Cabochon Pink Opal Gem (ID: 484836)
1.85 ct Opal
9 x 6.9 mm
$ 6.11
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0.6ct Oval Cabochon Multicolor Black Opal Gem (ID: 500066)
0.60 ct Black Opal
7.8 x 5.8 mm
$ 18.00
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3.7ct Oval Cabochon Yellow Dendrite Moss Opal Gem (ID: 470208)
3.65 ct Moss Opal
13.3 x 11.3 mm
$ 18.25
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1.3ct Oval Facet Reddish Orange Fire Opal Gem (ID: 367135)
1.34 ct Fire Opal
9.2 x 7.7 mm
$ 44.69
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1.1ct Oval Facet Multicolor Opal Gem (ID: 461785)
1.13 ct Opal
9.1 x 7.2 mm
$ 39.96
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4ct Oval Cabochon Yellow Dendrite Moss Opal Gem (ID: 470414)
3.98 ct Moss Opal
15.1 x 9.6 mm
$ 19.90
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5 pcs
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0.5ct Oval Cabochon Multicolor Chocolate Opal Gem (ID: 330691)
0.54 ct (total 2.71ctw) Chocolate Opal
7 x 5.1 mm
$ 81.30
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2 pcs
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0.9ct Oval Facet Orange Fire Opal Gem (ID: 453947)
0.87 ct (total 1.74ctw) Fire Opal
9 x 7.3 mm
$ 45.83
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4 pcs
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0.3ct Oval Facet Multicolor Opal Gem (ID: 471733)
0.28 ct (total 1.13ctw) Opal
6.1 x 4.1 mm
$ 35.47
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15.7ct Oval Cabochon Multicolor Opal Gem (ID: 462134)
15.72 ct Opal
19.5 x 17.1 mm
$ 632.89
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1.9ct Oval Cabochon Pink Opal Gem (ID: 484786)
1.86 ct Opal
9.2 x 7.1 mm
$ 6.14
Item in Stock
Oval Opal Gemstones
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.

Shop for oval opal gemstones in a variety of calibrated sizes, colors and origins. We have fire opal, opal doublets, common opal, black opal, boulder opal, chocolate opal and more in matching pairs, lots and cabochon or facet cuts.
Certified Customer Reviews
Overall Rating -> 10 star ratings
Colors and qualities of gems are very well represented online. Easy to use website. Great selections!
Posted By in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This was my second purchase from GemSelect and definitely won’t be my last! They have a very wide variety of gems and you can always find what you are looking for with ease and the prices are very good.
Posted By Jill in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Loved the wide selection of product
Posted By Miki in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
finally bought the last rock to complete my ring idea; needed another white one after giving the big diamond to my daughter. a diamond that size is out of my retired-school-teacher budget, so i bought a white zircon. went back to the same place that i got my loose sapphire-- great selection, good prices, good delivery!
Posted By Ptcmom in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I'm always real pleased with this website, I don't think there is much you could do to make it any better. I wish the shipping charges were lower, but it is understandable.
Posted By Spinch13 in November, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This is a site that sources valuable and genuine stones forms around the world, with and honest and descriptive sections, as well as specs, and the option to have the gemstone collection one might purchased—certified! Price ranges vary, but are always affordable and always worth it, whether it’s a gift, or for a personal business.
Posted By Bradley in November, 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