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You Selected (93): Boulder Opal Boulder Opal Clear All
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ID: 3004541 pcs
thumb image of 20.9ct Oval Cabochon Multicolor Boulder Opal (ID: 300454)
20.92 ct Boulder Opal
25.5 x 14.9 mm
$ 146.44
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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: 4207781 pcs
thumb image of 11.6ct Fancy Cabochon Multicolor Boulder Opal (ID: 420778)
11.56 ct Boulder Opal
16.4 x 12.6 mm
$ 69.36
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ID: 3695641 pcs
thumb image of 7.1ct Fancy Cabochon Multicolor Boulder Opal (ID: 369564)
7.09 ct Boulder Opal
13.9 x 11.9 mm
$ 49.63
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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: 3107651 pcs
thumb image of 7.3ct Oval Cabochon Multicolor Boulder Opal (ID: 310765)
7.27 ct Boulder Opal
20 x 9.3 mm
$ 50.89
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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: 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: 3218391 pcs
thumb image of 26.2ct Pear Cabochon Multicolor Boulder Opal (ID: 321839)
26.23 ct Boulder Opal
23.2 x 17 mm
$ 183.61
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ID: 2408211 pcs
thumb image of 6.6ct Fancy Cabochon Multicolor Boulder Opal (ID: 240821)
6.63 ct Boulder Opal
18.6 x 10.8 mm
$ 46.41
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ID: 3219201 pcs
thumb image of 21ct Oval Cabochon Multicolor Boulder Opal (ID: 321920)
21.04 ct Boulder Opal
27.9 x 12.8 mm
$ 147.28
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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: 4495201 pcs
thumb image of 29.5ct Pear Cabochon Multicolor Boulder Opal (ID: 449520)
29.52 ct Boulder Opal
38.7 x 17.9 mm
$ 206.64
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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: 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: 3656191 pcs
thumb image of 6.5ct Oval Cabochon Multicolor Boulder Opal (ID: 365619)
6.47 ct Boulder Opal
14.7 x 12.9 mm
$ 45.29
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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: 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: 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: 4535321 pcs
thumb image of 25.9ct Oval Cabochon Multicolor Boulder Opal (ID: 453532)
25.92 ct Boulder Opal
28.4 x 15.5 mm
$ 570.24
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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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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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