A week after the March 4 theft, staff at the Tiffany store noticed the $225,500 ring had been replaced with cubic zirconia stone, a manufactured gemstone that resembles diamonds, ...

International con man who used ‘sleight-of-hand’ to swipe $260K in diamond rings from Tiffany, Cartier pleads guilty By . Ariel Zilber. Published June 24, 2025, 12:32 p.m. ET.