Rare 300-carat diamond necklace with links to Marie Antoinette fetches €4.5m in Geneva auction Rare 18th-century diamond necklace, linked to Marie Antoinette scandal, fetches €4.5M at auction ...
The man-made diamond boom is over, and prices for ultra-trendy lab-grown diamonds are set to tumble this year, industry veterans say. Paul Zimnisky, a leading diamond analyst, foresees jewelers ...