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Buy Round Opal Gems

(245)
Gem Type Weight Size Clarity Price Origin
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Multicolor Chocolate Opal Gem - 11.3ct Round Cabochon (ID: 450844)

Round Multicolor Chocolate Opal

11.3ct
16.2 mm
$ 499.99
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6 pcs
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Multicolor Opal Gem - 1.1ct Round Cabochon (ID: 466390)

Round Multicolor Opal

1.07 ct (total 6.39ctw)
6.9 mm
$ 178.92
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5 pcs
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Multicolor Opal Gem - 0.8ct Round Cabochon (ID: 466389)

Round Multicolor Opal

0.81 ct (total 4.06ctw)
7 mm
$ 113.68
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4 pcs
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Multicolor Opal Gem - 2.1ct Round Cabochon (ID: 466302)

Round Multicolor Opal

2.07 ct (total 8.26ctw)
9 mm
$ 231.28
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4 pcs
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Multicolor Opal Gem - 0.3ct Round Cabochon (ID: 478462)

Round Multicolor Opal

0.29 ct (total 1.17ctw)
4.8 mm
$ 40.95
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4 pcs
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Multicolor Opal Gem - 1ct Round Cabochon (ID: 466423)

Round Multicolor Opal

0.96 ct (total 3.84ctw)
6.9 mm
$ 107.52
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1 pc
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Light Red Fire Opal Gem - 1.2ct Round Facet (ID: 511811)

Round Red Fire Opal

1.2ct
7.6 mm
$ 31.86
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6 pcs
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Multicolor Opal Gem - 0.4ct Round Cabochon (ID: 478915)

Round Multicolor Opal

0.41 ct (total 2.44ctw)
5.2 mm
$ 85.40
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4 pcs
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Multicolor Opal Gem - 0.7ct Round Cabochon (ID: 466298)

Round Multicolor Opal

0.69 ct (total 2.76ctw)
6.8 mm
$ 77.28
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1 pc
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Multicolor Opal Doublet Gem - 0.5ct Round Cabochon (ID: 544267)

Round Multicolor Opal Doublet

0.5ct
6 mm
$ 15.90
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1 pc
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Multicolor Opal Doublet Gem - 1.7ct Round Cabochon (ID: 542488)

Round Multicolor Opal Doublet

1.7ct
11 mm
$ 33.20
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2 pcs
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Multicolor Opal Gem - 0.3ct Round Cabochon (ID: 536901)

1 pc (avg. 0.30 ct) Multicolor Opal

5.1 mm
$ 6.73
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6 pcs
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Multicolor Opal Gem - 1.7ct Round Cabochon (ID: 466392)

Round Multicolor Opal

1.67 ct (total 10.00ctw)
8.2 mm
$ 280.00
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4 pcs
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Multicolor Opal Gem - 1.3ct Round Cabochon (ID: 466424)

Round Multicolor Opal

1.34 ct (total 5.36ctw)
8 mm
$ 150.08
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2 pcs
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Multicolor Opal Gem - 1.1ct Round Cabochon (ID: 537989)

Round Multicolor Opal

1.10 ct (total 2.19ctw)
7 mm
$ 49.08
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Bluish White Opal Gem - 0.9ct Round Cabochon (ID: 537556)

Round White Opal

0.9ct
7.2 mm
$ 19.94
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1 pc
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Multicolor Opal Gem - 1.1ct Round Cabochon (ID: 537811)

Round Multicolor Opal

1.1ct
7.9 mm
$ 24.20
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Bright Orange Fire Opal Gem - 0.7ct Round Facet (ID: 525548)

Round Orange Fire Opal

0.7ct
6.7 mm
$ 17.37
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4 pcs
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Multicolor Opal Gem - 0.3ct Round Cabochon (ID: 478464)

Round Multicolor Opal

0.30 ct (total 1.20ctw)
5 mm
$ 42.00
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4 pcs
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Multicolor Opal Gem - 0.5ct Round Cabochon (ID: 477436)

Round Multicolor Opal

0.51 ct (total 2.04ctw)
6 mm
$ 43.47
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5 pcs
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Multicolor Opal Gem - 0.3ct Round Cabochon (ID: 477502)

Round Multicolor Opal

0.27 ct (total 1.34ctw)
4.9 mm
$ 28.56
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.
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More Shapes
  • Asscher Cut
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  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
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  • Fancy Cabochon
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  • Fancy-Cut
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  • Flower-Cut
  • Half Heart Cabochon
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  • Oval Buff-Top
  • Oval Cabochon
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  • Oval Concave Cut
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  • Oval Diamond-Cut
  • Oval Facet
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  • Oval Portuguese-Cut
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  • Pear Cabochon
  • Pear Checkerboard
  • Pear Checkerboard with Hole
  • Pear Concave Cut
  • Pear Concave Fantasy Cut
  • Pear Crystal Cluster
  • Pear Double-Sided Checkerboard
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  • Round Buff-Top
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Popular Gemstones
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All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
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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