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Australian boulder opal grades
What is the difference between Australian black opal and Australian boulder opal?
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Australian boulder opal grades
What is the difference between Australian black opal and Australian boulder opal?
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Collection:
Green-blue opals
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10.08 Ct green-blue oval boulder opal
10.08 Ct green-blue oval boulder opal
9.54 Ct purple oval boulder opal
9.54 Ct purple oval boulder opal
9.17 Ct blue rectangle boulder opal
9.17 Ct blue rectangle boulder opal
8.95 Ct electric green boulder opal
8.95 Ct electric green boulder opal
43.57 Ct top gem grade boulder opal
43.57 Ct top gem grade boulder opal
3.53 Ct small boulder opal
3.53 Ct small boulder opal
18.14 Ct green-blue and red boulder opal
18.14 Ct green-blue and red boulder opal
20.31 Ct oval boulder opal
20.31 Ct oval boulder opal
10.56 Ct wavy boulder opal
10.56 Ct wavy boulder opal
29.47 Ct free-form ocean tone boulder opal
29.47 Ct free-form ocean tone boulder opal
28.40 Ct top gem grade boulder opal
28.40 Ct top gem grade boulder opal
14.00 Ct unusual lime green gem boulder opal
14.00 Ct unusual lime green gem boulder opal
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