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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: 3218461 pcs
thumb image of 21.6ct Trillion Cabochon Multicolor Boulder Opal (ID: 321846)
21.64 ct Boulder Opal
21.2 x 20.6 mm
$ 151.48
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ID: 3656211 pcs
thumb image of 7ct Fancy Cabochon Multicolor Boulder Opal (ID: 365621)
6.99 ct Boulder Opal
14.3 x 11 mm
$ 48.93
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ID: 3221161 pcs
thumb image of 36.7ct Trillion Cabochon Multicolor Boulder Opal (ID: 322116)
36.68 ct Boulder Opal
21.8 x 21.1 mm
$ 256.76
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ID: 3219231 pcs
thumb image of 35.8ct Pear Cabochon Multicolor Boulder Opal (ID: 321923)
35.81 ct Boulder Opal
26.4 x 23.5 mm
$ 250.67
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ID: 4618701 pcs
thumb image of 7ct Round Cabochon Multicolor Boulder Opal (ID: 461870)
6.96 ct Boulder Opal
13.4 mm
$ 48.86
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ID: 3220371 pcs
thumb image of 42.7ct Oval Cabochon Multicolor Boulder Opal (ID: 322037)
42.73 ct Boulder Opal
27.5 x 20.8 mm
$ 299.11
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ID: 3029191 pcs
thumb image of 7.8ct Pear Cabochon Multicolor Boulder Opal (ID: 302919)
7.81 ct Boulder Opal
16.4 x 10.5 mm
$ 54.67
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ID: 2408211 pcs
thumb image of 6.6ct Oval Cabochon Multicolor Boulder Opal (ID: 240821)
6.63 ct Boulder Opal
18.6 x 10.8 mm
$ 46.41
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ID: 3219281 pcs
thumb image of 45.2ct Pear Cabochon Multicolor Boulder Opal (ID: 321928)
45.15 ct Boulder Opal
33.4 x 19.8 mm
$ 316.05
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ID: 3227301 pcs
thumb image of 11.9ct Round Cabochon Multicolor Boulder Opal (ID: 322730)
11.89 ct Boulder Opal
14.9 mm
$ 83.23
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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: 3220381 pcs
thumb image of 54.7ct Oval Cabochon Multicolor Boulder Opal (ID: 322038)
54.71 ct Boulder Opal
27.3 x 23.3 mm
$ 382.97
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ID: 3218381 pcs
thumb image of 20.9ct Pear Cabochon Multicolor Boulder Opal (ID: 321838)
20.90 ct Boulder Opal
23.5 x 19.6 mm
$ 146.30
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ID: 4496001 pcs
thumb image of 66.3ct Oval Cabochon Multicolor Boulder Opal (ID: 449600)
66.28 ct Boulder Opal
39.3 x 28.2 mm
$ 463.96
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ID: 3004501 pcs
thumb image of 33.4ct Oval Cabochon Multicolor Boulder Opal (ID: 300450)
33.36 ct Boulder Opal
28.1 x 19 mm
$ 233.52
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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: 4535341 pcs
thumb image of 22.9ct Pear Cabochon Multicolor Boulder Opal (ID: 453534)
22.94 ct Boulder Opal
29.2 x 14.7 mm
$ 504.68
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ID: 4618661 pcs
thumb image of 6ct Oval Cabochon Multicolor Boulder Opal (ID: 461866)
6.02 ct Boulder Opal
12.4 x 10.4 mm
$ 42.26
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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: 4535331 pcs
thumb image of 27.4ct Oval Cabochon Multicolor Boulder Opal (ID: 453533)
27.43 ct Boulder Opal
35.8 x 12.4 mm
$ 603.46
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Boulder Opal

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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