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2.5ct Freeform Australian Crystal Opal Solid, 19x11mm
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Australian Crystal Opal | Etsy
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Australian Crystal Opal - Teragems - Stephen Rosenberg Gemmology
Romancing Australia's rarest opal - ABC (none) - Australian Broadcasting Corporation
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Just Opal | 3 carats Solid Lightning Ridge Australian Black Crystal Opal (14336) | Opals & So Much More
