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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (111): Boulder Opal Clear All
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ID: 3218351 pcs
8.60ct Boulder Opal
18.86mm x 12.49mm x 5.41mm
USD 60.20
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ID: 3695631 pcs
7.77ct Boulder Opal
12.44mm x 11.21mm x 6.48mm
USD 54.39
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ID: 3028991 pcs
17.27ct Boulder Opal
23.46mm x 13.52mm x 6.64mm
USD 120.89
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ID: 3365761 pcs
15.80ct Boulder Opal
18.58mm x 17.72mm x 5.24mm
USD 110.60
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ID: 4207451 pcs
13.53ct Boulder Opal
19.10mm x 13.72mm x 6.72mm
USD 81.18
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ID: 4207801 pcs
10.63ct Boulder Opal
16.63mm x 12.34mm x 6.04mm
USD 63.78
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ID: 3537021 pcs
6.14ct Boulder Opal
16.03mm x 10.01mm x 4.53mm
USD 42.98
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ID: 4207771 pcs
16.19ct Boulder Opal
20.35mm x 12.30mm x 7.69mm
USD 97.14
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ID: 4207341 pcs
7.53ct Boulder Opal
14.15mm x 11.43mm x 5.41mm
USD 45.18
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ID: 3219221 pcs
28.03ct Boulder Opal
27.22mm x 19.56mm x 6.87mm
USD 196.21
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ID: 4207391 pcs
7.52ct Boulder Opal
15.75mm x 10.60mm x 5.59mm
USD 45.12
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ID: 3219281 pcs
45.15ct Boulder Opal
33.43mm x 19.84mm x 7.85mm
USD 316.05
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ID: 4207561 pcs
4.45ct Boulder Opal
16.02mm x 8.65mm x 4.62mm
USD 26.70
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ID: 4206321 pcs
8.77ct Boulder Opal
14.13mm x 11.34mm x 6.69mm
USD 52.62
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ID: 3004501 pcs
33.36ct Boulder Opal
28.14mm x 19.04mm x 7.02mm
USD 233.52
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ID: 3656211 pcs
6.99ct Boulder Opal
14.34mm x 10.97mm x 5.35mm
USD 48.93
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ID: 4207471 pcs
8.57ct Boulder Opal
21.92mm x 10.12mm x 4.47mm
USD 51.42
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ID: 3029261 pcs
22.16ct Boulder Opal
22.69mm x 18.08mm x 6.29mm
USD 155.12
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ID: 4207201 pcs
3.96ct Boulder Opal
10.80mm x 9.90mm x 4.33mm
USD 23.76
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ID: 3656251 pcs
6.14ct Boulder Opal
12.61mm x 10.04mm x 5.87mm
USD 42.98
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ID: 3001271 pcs
10.90ct Boulder Opal
15.95mm x 13.77mm x 6.57mm
USD 294.30
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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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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