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37cts Natural UNTREATED BLACK Ethiopian Welo Crystal Opal Specimen Rough S3013

Opal has long been regarded as the fifth precious gemstone. Description from opalauctions.com. I searched for this on bing.com/images

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Details about 13ct RARE UNTREATED BLACK DRAGON EGG Natural Ethiopian Welo Specimen Opal AD1944

13ct RARE UNTREATED DARK DRAGON EGG Natural Ethiopian Welo Specimen Opal AD1944

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1.73ct Natural Untreated Australian Lightning Ridge Solid Black Opal AD7190

*DAZZLING* BLACK OPAL 21.40 CARATS K1076 Item Type: NATURAL SOLID BLACK OPAL Origin :LIGHTNING RIDGE Opal Size : 29 X 22 X 5 MM Treated/Untreated : UNTREATED Weight (Carats) : 21.40 CTS