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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (452): Opal Cabochons Fire Opal, Opal, Opal Doublet, Boulder Opal, Chocolate Opal, Black Opal Clear All
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ID: 4622011 pcs
thumb image of 19.7ct Oval Cabochon Multicolor Opal (ID: 462201)
19.73 ct Opal
20.3 x 17.5 mm
$ 794.33
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ID: 4535591 pcs
thumb image of 27.9ct Fancy Cabochon Multicolor Boulder Opal (ID: 453559)
27.93 ct Boulder Opal
26 x 18.5 mm
$ 614.46
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ID: 4620921 pcs
thumb image of 18.3ct Oval Cabochon Multicolor Opal (ID: 462092)
18.33 ct Opal
20 x 16.9 mm
$ 737.97
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ID: 3689444 pcs
thumb image of 2.6ct Oval Cabochon Multicolor Opal (ID: 368944)
2.59 ct Opal
7.8 x 6 mm
$ 70.27
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ID: 3804071 pcs
thumb image of 18.4ct Pear Cabochon Yellow Fire Opal (ID: 380407)
18.36 ct Fire Opal
31.3 x 15.4 mm
$ 396.76
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ID: 4621331 pcs
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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ID: 3804051 pcs
thumb image of 21.5ct Pear Cabochon Yellow Fire Opal (ID: 380405)
21.54 ct Fire Opal
29.7 x 16.3 mm
$ 465.48
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ID: 4622201 pcs
thumb image of 14.4ct Oval Cabochon Multicolor Opal (ID: 462220)
14.37 ct Opal
20.5 x 16.4 mm
$ 578.54
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ID: 3804011 pcs
thumb image of 15.8ct Oval Cabochon Yellow Fire Opal (ID: 380401)
15.79 ct Fire Opal
22.3 x 14.9 mm
$ 341.22
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ID: 4321841 pcs
thumb image of 0.6ct Oval Cabochon White Opal (ID: 432184)
0.61 ct Opal
6.9 x 5.7 mm
$ 17.08
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ID: 3804031 pcs
thumb image of 15.6ct Pear Cabochon Yellow Fire Opal (ID: 380403)
15.63 ct Fire Opal
29.4 x 14.1 mm
$ 337.76
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ID: 4294621 pcs
thumb image of 0.6ct Oval Cabochon Multicolor Opal (ID: 429462)
0.64 ct Opal
8 x 6.1 mm
$ 17.92
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ID: 3245431 pcs
thumb image of 9.9ct Pear Cabochon Orange Opal (ID: 324543)
9.93 ct Opal
22.5 x 14.7 mm
$ 397.20
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ID: 3830931 pcs
thumb image of 10.9ct Pear Cabochon Yellow Fire Opal (ID: 383093)
10.94 ct Fire Opal
22.1 x 13.7 mm
$ 233.57
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ID: 3306424 pcs
thumb image of 2.8ct Oval Cabochon Multicolor Chocolate Opal (ID: 330642)
2.83 ct Chocolate Opal
7 x 5.1 mm
$ 84.90
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ID: 4469342 pcs
thumb image of 15.7ct Fancy Cabochon Blue Opal Doublet (ID: 446934)
15.67 ct Opal Doublet
26.1 x 11 mm
$ 235.05
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ID: 3830871 pcs
thumb image of 10.7ct Pear Cabochon Yellow Orange Fire Opal (ID: 383087)
10.70 ct Fire Opal
23 x 13.1 mm
$ 228.44
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ID: 3303254 pcs
thumb image of 3ct Oval Cabochon Multicolor Chocolate Opal (ID: 330325)
3.00 ct Chocolate Opal
7.9 x 6.1 mm
$ 90.00
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ID: 3804061 pcs
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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ID: 3193901 pcs
thumb image of 4ct Marquise Cabochon Multicolor Black Opal (ID: 319390)
3.99 ct Black Opal
18.7 x 8.3 mm
$ 159.60
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ID: 3303414 pcs
thumb image of 3ct Oval Cabochon Multicolor Chocolate Opal (ID: 330341)
3.01 ct Chocolate Opal
7.1 x 6 mm
$ 90.30
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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.
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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