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HARRY DEMPSEY, LAURA ONITA Y CHLOE CORNISH
Competition from synthetics drives down the price of natural stones, but raises fears of bankruptcies for lab-grown diamond producers.
When Jenny King-Modlin got engaged two years ago, her partner put a 1.3-carat diamond ring on her finger to show he loved her. But unlike the bridal rings that have dominated the world market for decades, he
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