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0.68 ct natural solid black opal gemstone -video- opalfirst.com - Australia

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Oval Semi Black Opal Stone Red Blue Green Colors | FlashOpal

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1.14 cts Australian Black Opal Lightning Ridge, Solid Gem Stone, Cabochon

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Bright Gem Green Black Opal 2.90ct

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Double flash opal cabochon 2.90 CTS www.puritygems.etsy.com

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