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Gemtype Color Shape Weight Size Date Clarity Price Origin
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ID: 3030251 pcs
18.34ct Boulder Opal
21.12mm x 14.70mm x 7.03mm
USD 128.38
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ID: 2480001 pcs
13.14ct Boulder Opal
19.47mm x 13.51mm x 5.47mm
USD 91.98
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ID: 3219231 pcs
35.81ct Boulder Opal
26.35mm x 23.49mm x 8.09mm
USD 250.67
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ID: 3697021 pcs
7.49ct Boulder Opal
14.33mm x 11.42mm x 5.80mm
USD 52.43
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ID: 3652481 pcs
11.33ct Boulder Opal
15.83mm x 12.78mm x 6.51mm
USD 79.31
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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: 3029221 pcs
32.39ct Boulder Opal
33.69mm x 14.95mm x 7.49mm
USD 226.73
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ID: 3029171 pcs
5.66ct Boulder Opal
14.04mm x 9.90mm x 5.61mm
USD 39.62
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ID: 4206811 pcs
9.90ct Boulder Opal
17.72mm x 14.03mm x 5.08mm
USD 59.40
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ID: 4207641 pcs
3.84ct Boulder Opal
10.76mm x 8.96mm x 4.54mm
USD 23.04
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ID: 3218371 pcs
16.89ct Boulder Opal
20.66mm x 14.77mm x 7.56mm
USD 456.03
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ID: 3656271 pcs
6.83ct Boulder Opal
13.30mm x 10.91mm x 5.44mm
USD 47.81
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ID: 4207491 pcs
10.89ct Boulder Opal
16.93mm x 12.57mm x 5.73mm
USD 65.34
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ID: 3108151 pcs
16.32ct Boulder Opal
18.73mm x 14.73mm x 7.11mm
USD 114.24
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ID: 4206331 pcs
8.17ct Boulder Opal
19.97mm x 10.51mm x 4.79mm
USD 49.02
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ID: 4206751 pcs
11.21ct Boulder Opal
17.95mm x 13.59mm x 5.71mm
USD 67.26
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ID: 4207831 pcs
16.69ct Boulder Opal
24.73mm x 12.40mm x 6.10mm
USD 100.14
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ID: 4207281 pcs
3.64ct Boulder Opal
12.20mm x 7.37mm x 5.05mm
USD 21.84
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ID: 3221161 pcs
36.68ct Boulder Opal
21.82mm x 21.14mm x 10.00mm
USD 256.76
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

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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