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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (109): Boulder Opal Clear All
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ID: 3107651 pcs
7.27ct Boulder Opal
19.96mm x 9.30mm x 5.54mm
USD 196.29
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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: 3108161 pcs
9.49ct Boulder Opal
15.97mm x 10.33mm x 6.86mm
USD 256.23
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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: 3029261 pcs
22.16ct Boulder Opal
22.69mm x 18.08mm x 6.29mm
USD 155.12
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ID: 3218421 pcs
22.67ct Boulder Opal
21.79mm x 16.53mm x 7.61mm
USD 158.69
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ID: 4341861 pcs
7.00ct Boulder Opal
15.18mm x 10.61mm x 5.12mm
USD 49.00
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ID: 3693951 pcs
4.97ct Boulder Opal
11.04mm x 9.89mm x 5.08mm
USD 34.79
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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: 3218461 pcs
21.64ct Boulder Opal
21.16mm x 20.64mm x 5.30mm
USD 151.48
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ID: 4207321 pcs
8.11ct Boulder Opal
13.34mm x 11.42mm x 5.78mm
USD 48.66
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ID: 4206781 pcs
11.91ct Boulder Opal
23.63mm x 10.59mm x 5.57mm
USD 71.46
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ID: 3695621 pcs
7.03ct Boulder Opal
14.44mm x 9.49mm x 5.60mm
USD 49.21
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ID: 3107631 pcs
7.78ct Boulder Opal
16.59mm x 10.92mm x 5.26mm
USD 210.06
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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: 3029171 pcs
5.66ct Boulder Opal
14.04mm x 9.90mm x 5.61mm
USD 39.62
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ID: 3218451 pcs
22.54ct Boulder Opal
24.79mm x 20.04mm x 5.56mm
USD 157.78
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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: 4207801 pcs
10.63ct Boulder Opal
16.63mm x 12.34mm x 6.04mm
USD 63.78
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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: 3652421 pcs
9.92ct Boulder Opal
17.00mm x 11.44mm x 6.09mm
USD 69.44
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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