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ID: 3537021 pcs
thumb image of 6.1ct Pear Cabochon Multicolor Boulder Opal (ID: 353702)
6.14 ct Boulder Opal
16 x 10 mm
$ 42.98
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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: 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: 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: 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: 4207531 pcs
thumb image of 25.6ct Fancy Cabochon Multicolor Boulder Opal (ID: 420753)
25.57 ct Boulder Opal
24.8 x 15.8 mm
$ 153.42
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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: 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: 3218351 pcs
thumb image of 8.6ct Pear Cabochon Multicolor Boulder Opal (ID: 321835)
8.60 ct Boulder Opal
18.9 x 12.5 mm
$ 60.20
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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: 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: 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: 4619231 pcs
thumb image of 5.4ct Oval Cabochon Multicolor Boulder Opal (ID: 461923)
5.40 ct Boulder Opal
15.7 x 8.8 mm
$ 37.91
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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: 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: 3218371 pcs
thumb image of 16.9ct Pear Cabochon Multicolor Boulder Opal (ID: 321837)
16.89 ct Boulder Opal
20.7 x 14.8 mm
$ 118.23
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ID: 4618731 pcs
thumb image of 4.8ct Fancy Cabochon Multicolor Boulder Opal (ID: 461873)
4.82 ct Boulder Opal
17.6 x 8.2 mm
$ 33.84
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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: 4495271 pcs
thumb image of 9.1ct Pear Cabochon Multicolor Boulder Opal (ID: 449527)
9.13 ct Boulder Opal
18 x 11.7 mm
$ 63.91
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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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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

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