Carats & Coils The work of Italian jewelry designer Roberto Demeglio was introduced to U.S.  clients of Beny Sofer in New York City just earlier this year, and Sofer has already placed the line in 70 stores nationwide. Signature Demeglio looks include ­diamond-accented ceramic numbers that resemble dominoes and patented stretchable bracelets and rings that are drenched in diamonds, like the wide cuff pictured here. Pieces are made in 18k gold and the stretchable styles feature a patented stainless-steel coil system that’s concealed beneath the bling, allowing pieces to “slide on eas