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ID: 4206781 pcs
thumb image of 11.9ct Fancy Cabochon Multicolor Boulder Opal (ID: 420678)
11.91 ct Boulder Opal
23.6 x 10.6 mm
$ 71.46
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ID: 4495221 pcs
thumb image of 13.1ct Oval Cabochon Multicolor Boulder Opal (ID: 449522)
13.05 ct Boulder Opal
20.2 x 14.3 mm
$ 91.35
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ID: 3693951 pcs
thumb image of 5ct Oval Cabochon Multicolor Boulder Opal (ID: 369395)
4.97 ct Boulder Opal
11 x 9.9 mm
$ 34.79
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ID: 4101191 pcs
thumb image of 34.2ct Oval Cabochon Multicolor Boulder Opal (ID: 410119)
34.16 ct Boulder Opal
23.4 x 19.6 mm
$ 239.47
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ID: 3029001 pcs
thumb image of 23.3ct Oval Cabochon Multicolor Boulder Opal (ID: 302900)
23.34 ct Boulder Opal
20.8 x 14 mm
$ 163.38
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ID: 3029151 pcs
thumb image of 23.5ct Round Cabochon Multicolor Boulder Opal (ID: 302915)
23.48 ct Boulder Opal
21.3 mm
$ 164.36
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ID: 3653121 pcs
thumb image of 5ct Oval Cabochon Multicolor Boulder Opal (ID: 365312)
4.95 ct Boulder Opal
11.3 x 9.2 mm
$ 34.65
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ID: 4207821 pcs
thumb image of 12.4ct Fancy Cabochon Multicolor Boulder Opal (ID: 420782)
12.42 ct Boulder Opal
18.1 x 13.1 mm
$ 74.52
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ID: 3107461 pcs
thumb image of 10.5ct Pear Cabochon Multicolor Boulder Opal (ID: 310746)
10.52 ct Boulder Opal
21.7 x 13 mm
$ 73.64
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ID: 3656271 pcs
thumb image of 6.8ct Fancy Cabochon Multicolor Boulder Opal (ID: 365627)
6.83 ct Boulder Opal
13.3 x 10.9 mm
$ 47.81
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ID: 4206281 pcs
thumb image of 9.1ct Oval Cabochon Multicolor Boulder Opal (ID: 420628)
9.05 ct Boulder Opal
16 x 10.9 mm
$ 54.30
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ID: 3218451 pcs
thumb image of 22.5ct Oval Cabochon Multicolor Boulder Opal (ID: 321845)
22.54 ct Boulder Opal
24.8 x 20 mm
$ 157.78
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ID: 3219301 pcs
thumb image of 36.1ct Oval Cabochon Multicolor Boulder Opal (ID: 321930)
36.09 ct Boulder Opal
29.8 x 18.5 mm
$ 252.63
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ID: 4495261 pcs
thumb image of 16.8ct Oval Cabochon Multicolor Boulder Opal (ID: 449526)
16.77 ct Boulder Opal
27.1 x 16 mm
$ 117.39
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ID: 3108161 pcs
thumb image of 9.5ct Oval Cabochon Multicolor Boulder Opal (ID: 310816)
9.49 ct Boulder Opal
16 x 10.3 mm
$ 66.43
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ID: 4207311 pcs
thumb image of 7.3ct Oval Cabochon Multicolor Boulder Opal (ID: 420731)
7.28 ct Boulder Opal
12.4 x 10.2 mm
$ 43.68
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ID: 3717011 pcs
thumb image of 33.9ct Trillion Cabochon Multicolor Boulder Opal (ID: 371701)
33.93 ct Boulder Opal
26.7 x 21.3 mm
$ 204.06
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ID: 4206801 pcs
thumb image of 12.8ct Oval Cabochon Multicolor Boulder Opal (ID: 420680)
12.77 ct Boulder Opal
18.9 x 12.9 mm
$ 76.62
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ID: 3029171 pcs
thumb image of 5.7ct Pear Cabochon Multicolor Boulder Opal (ID: 302917)
5.66 ct Boulder Opal
14 x 9.9 mm
$ 39.62
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ID: 3107621 pcs
thumb image of 6.1ct Oval Cabochon Multicolor Boulder Opal (ID: 310762)
6.07 ct Boulder Opal
19.1 x 7.7 mm
$ 42.49
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ID: 4206741 pcs
thumb image of 15.5ct Fancy Cabochon Multicolor Boulder Opal (ID: 420674)
15.53 ct Boulder Opal
18.3 x 13.8 mm
$ 93.18
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Boulder Opal
Boulder Opal Gemstone InformationOpal Ring Information

Boulder opal is the second most prized form of opal, after black opal. The name derives from the fact that boulder opal is found embedded in ironstone boulders. The opal usually forms as thin veins within these boulders, and most stones are cut to include some of the host ironstone matrix. Boulder opal is sometimes referred to as opal in matrix for this reason. Boulder opal is especially attractive because, like the black opal, it has a dark body tone which adds vibrancy to the play of color. Boulder opal also has a higher density because of the ironstone content, and can be more durable as well.

Browse Similar or Related Gemstones:
All Opal Gemstones
Black Opal Gemstones
Opal Doublet Gemstones
Opal in Matrix Gemstones
Fire Opal 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

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

Note: 1ct = 0.2g

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