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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: 3656251 pcs
6.14ct Boulder Opal
12.61mm x 10.04mm x 5.87mm
USD 42.98
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ID: 3218391 pcs
26.23ct Boulder Opal
23.22mm x 17.01mm x 9.46mm
USD 183.61
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ID: 4206721 pcs
12.14ct Boulder Opal
16.61mm x 13.33mm x 6.65mm
USD 72.84
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ID: 4089501 pcs
8.87ct Boulder Opal
13.37mm x 11.14mm x 6.67mm
USD 62.09
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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: 3029211 pcs
17.33ct Boulder Opal
28.82mm x 14.68mm x 4.85mm
USD 121.31
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ID: 4206821 pcs
22.65ct Boulder Opal
29.31mm x 12.91mm x 7.58mm
USD 135.90
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ID: 3107381 pcs
6.43ct Boulder Opal
15.03mm x 12.10mm x 5.62mm
USD 45.01
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ID: 3652241 pcs
13.21ct Boulder Opal
14.39mm x 14.08mm x 7.05mm
USD 92.47
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ID: 3219271 pcs
31.20ct Boulder Opal
29.45mm x 20.55mm x 6.40mm
USD 218.40
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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: 2480001 pcs
13.14ct Boulder Opal
19.47mm x 13.51mm x 5.47mm
USD 91.98
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ID: 4101191 pcs
34.16ct Boulder Opal
23.40mm x 19.60mm x 9.71mm
USD 239.47
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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: 4207781 pcs
11.56ct Boulder Opal
16.38mm x 12.57mm x 6.65mm
USD 69.36
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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: 3218381 pcs
20.90ct Boulder Opal
23.48mm x 19.55mm x 6.06mm
USD 146.30
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ID: 3227301 pcs
11.89ct Boulder Opal
14.86mm x 6.74mm
USD 321.03
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ID: 4207531 pcs
25.57ct Boulder Opal
24.83mm x 15.84mm x 7.78mm
USD 153.42
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ID: 4207541 pcs
13.34ct Boulder Opal
20.34mm x 11.85mm x 6.73mm
USD 80.04
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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

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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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