13 novembre 2015
Guinness Book of World Records: Largest Recorded Black Opal Specime. "The Sea of Opal"
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Guinness Book of World Records: Largest Recorded Black Opal Specimen--"The Sea of Opal", Joe's Run, Grawin Field, near Lightning Ridge, New South Wales, Australia. Carved and polished by Christine Rousel. Estimate US$ 150,000 - 250,000 (€140,000 - 230,000...