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Sapphire-and-Diamond Necklace to Sparkle at Bonhams Auction

Piece carries high estimate of $55,000 in Fine Jewelry: California sale.

1-carat RAPI sees its first increase in 15 months.

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.

Synthetics market in UAE grew a record 92% by volume last year to 76.9 million carats.

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, scientists believe.

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.

1-carat RAPI rises for second straight month.