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You Selected (93): Boulder Opal Boulder Opal Clear All
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ID: 4495251 pcs
thumb image of 15.9ct Oval Cabochon Multicolor Boulder Opal (ID: 449525)
15.88 ct Boulder Opal
22.8 x 15.2 mm
$ 111.16
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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: 3365761 pcs
thumb image of 15.8ct Fancy Cabochon Multicolor Boulder Opal (ID: 336576)
15.80 ct Boulder Opal
18.6 x 17.7 mm
$ 110.60
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ID: 3652311 pcs
thumb image of 15.1ct Round Cabochon Multicolor Boulder Opal (ID: 365231)
15.09 ct Boulder Opal
16.4 mm
$ 105.63
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ID: 3028991 pcs
thumb image of 17.3ct Pear Cabochon Multicolor Boulder Opal (ID: 302899)
17.27 ct Boulder Opal
23.5 x 13.5 mm
$ 120.89
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ID: 3652231 pcs
thumb image of 13.5ct Fancy Cabochon Multicolor Boulder Opal (ID: 365223)
13.52 ct Boulder Opal
26.5 x 11.8 mm
$ 94.64
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ID: 3652301 pcs
thumb image of 17.6ct Fancy Cabochon Multicolor Boulder Opal (ID: 365230)
17.55 ct Boulder Opal
19.4 x 13.3 mm
$ 122.85
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ID: 4206821 pcs
thumb image of 22.7ct Fancy Cabochon Multicolor Boulder Opal (ID: 420682)
22.65 ct Boulder Opal
29.3 x 12.9 mm
$ 135.90
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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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ID: 3652241 pcs
thumb image of 13.2ct Fancy Cabochon Multicolor Boulder Opal (ID: 365224)
13.21 ct Boulder Opal
14.4 x 14.1 mm
$ 92.47
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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: 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: 4495981 pcs
thumb image of 12.4ct Cushion Cabochon Multicolor Boulder Opal (ID: 449598)
12.42 ct Boulder Opal
17.1 x 14.5 mm
$ 86.94
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ID: 3108151 pcs
thumb image of 16.3ct Oval Cabochon Multicolor Boulder Opal (ID: 310815)
16.32 ct Boulder Opal
18.7 x 14.7 mm
$ 114.24
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ID: 3219261 pcs
thumb image of 21.5ct Pear Cabochon Multicolor Boulder Opal (ID: 321926)
21.46 ct Boulder Opal
28.9 x 18.8 mm
$ 150.22
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ID: 3218361 pcs
thumb image of 13.4ct Pear Cabochon Multicolor Boulder Opal (ID: 321836)
13.35 ct Boulder Opal
21.4 x 15 mm
$ 93.45
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ID: 4207541 pcs
thumb image of 13.3ct Fancy Cabochon Multicolor Boulder Opal (ID: 420754)
13.34 ct Boulder Opal
20.3 x 11.9 mm
$ 80.04
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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: 4495291 pcs
thumb image of 11.1ct Pear Cabochon Multicolor Boulder Opal (ID: 449529)
11.13 ct Boulder Opal
17.7 x 15.6 mm
$ 77.91
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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: 4207441 pcs
thumb image of 12.9ct Oval Cabochon Multicolor Boulder Opal (ID: 420744)
12.87 ct Boulder Opal
21 x 10 mm
$ 77.22
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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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