8.58ct black opal 17x 12.3x6MM

Gem type: Opal
Natural Solid Untreated Australian Black Opal Polished Stone
Left Weight: 8.58carats
Dimensions: 17mm x 12.3mm x 6mm

Right Weight：7.35carats                                        Dimensions: 17mm x 12.7mm x 5.3mm
Source: Lightning Ridge, NSW, Australia
Size and weight are approximate
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