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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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1.35 Ct extra small boulder opal
1.35 Ct extra small boulder opal
10.08 Ct green-blue oval boulder opal
10.08 Ct green-blue oval boulder opal
10.30 Ct top gem rainbow boulder opal
10.30 Ct top gem rainbow boulder opal
10.56 Ct wavy boulder opal
10.56 Ct wavy boulder opal
10.67 Ct top gem grade oval boulder opal
10.67 Ct top gem grade oval boulder opal
10.80 Ct top gem green-blue boulder opal
10.80 Ct top gem green-blue boulder opal
10.93 Ct gem grade boulder opal
10.93 Ct gem grade boulder opal
11.16 Ct 'light and dark' boulder opal
11.16 Ct 'light and dark' boulder opal
11.54 Ct top gem boulder opal
11.54 Ct top gem boulder opal
11.61 Ct top gem teardrop boulder opal
11.61 Ct top gem teardrop boulder opal
11.75 Ct green-blue and pink boulder opal
11.75 Ct green-blue and pink boulder opal
11.86 Ct top gem boulder opal
11.86 Ct top gem boulder opal
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