Jewel was from the collection of Queen Nazli, former queen mother of Egypt.
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Company’s chief financial officer, Steven Thomas, left September 1.
Diamond, ruby and emerald set has an upper estimate of $153,000 at the online sale.
Revenue from the division, which includes three jewelry companies, stayed flat.
United Arab Emirates reached a record 92% growth to 76.9 million carats in 2025.
Revenue from jewelry, watches, clocks and valuable gifts up 20% year on year in July.
Growers intentionally shaped 6.87-carat specimen to resemble a mined crystal, institute believes.
Group sales up 1.9% to $469.6 million.
Testing shows gems are copper-bearing Paraiba, with a color variation stemming from different chemical composition.
Jewel was from the collection of Queen Nazli, former queen mother of Egypt.
New date of September 1, 2027, includes loose stones above 0.50 carats that meet the criteria.