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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (59): Boulder Opal Clear All
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21ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 321920)
21.04 ct Boulder Opal
27.9 x 12.8 mm
$ 147.28
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21.2ct Pear Cabochon Multicolor Boulder Opal Gem (ID: 449597)
21.20 ct Boulder Opal
25 x 18.5 mm
$ 148.40
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17.3ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 302921)
17.33 ct Boulder Opal
28.8 x 14.7 mm
$ 121.31
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21.5ct Pear Cabochon Multicolor Boulder Opal Gem (ID: 321926)
21.46 ct Boulder Opal
28.9 x 18.8 mm
$ 150.22
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22.7ct Fancy Cabochon Multicolor Boulder Opal Gem (ID: 420682)
22.65 ct Boulder Opal
29.3 x 12.9 mm
$ 135.90
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21.6ct Trillion Cabochon Multicolor Boulder Opal Gem (ID: 321846)
21.64 ct Boulder Opal
21.2 x 20.6 mm
$ 151.48
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15.8ct Round Cabochon Multicolor Boulder Opal Gem (ID: 336576)
15.80 ct Boulder Opal
18.6 mm
$ 110.60
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22.2ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 302926)
22.16 ct Boulder Opal
22.7 x 18.1 mm
$ 155.12
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15.1ct Round Cabochon Multicolor Boulder Opal Gem (ID: 365231)
15.09 ct Boulder Opal
16.4 mm
$ 105.63
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22.5ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 321845)
22.54 ct Boulder Opal
24.8 x 20 mm
$ 157.78
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13.5ct Fancy Cabochon Multicolor Boulder Opal Gem (ID: 365223)
13.52 ct Boulder Opal
26.5 x 11.8 mm
$ 94.64
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23.3ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 302900)
23.34 ct Boulder Opal
20.8 x 14 mm
$ 163.38
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15.6ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 420671)
15.56 ct Boulder Opal
19.3 x 14.3 mm
$ 93.36
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23.5ct Round Cabochon Multicolor Boulder Opal Gem (ID: 302915)
23.48 ct Boulder Opal
21.3 mm
$ 164.36
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13.4ct Pear Cabochon Multicolor Boulder Opal Gem (ID: 321836)
13.35 ct Boulder Opal
21.4 x 15 mm
$ 93.45
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26.2ct Pear Cabochon Multicolor Boulder Opal Gem (ID: 321839)
26.23 ct Boulder Opal
23.2 x 17 mm
$ 183.61
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13.2ct Fancy Cabochon Multicolor Boulder Opal Gem (ID: 365224)
13.21 ct Boulder Opal
14.4 x 14.1 mm
$ 92.47
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28ct Pear Cabochon Multicolor Boulder Opal Gem (ID: 321922)
28.03 ct Boulder Opal
27.2 x 19.6 mm
$ 196.21
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40ct Drilled Sphere Multicolor Boulder Opal Gem (ID: 469563)
39.95 ct Boulder Opal
17.6 mm
$ 199.75
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20.9ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 300454)
20.92 ct Boulder Opal
25.5 x 14.9 mm
$ 146.44
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22.7ct Oval Cabochon Multicolor Boulder Opal Gem (ID: 321842)
22.67 ct Boulder Opal
21.8 x 16.5 mm
$ 158.69
Item in Stock
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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.

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