More than 170 exhibitors from around the globe will offer their collections—worth more than $1 billon in total—at this year’s Palm Beach Jewelry, Art & Antique Show. The Florida show’s 12th annual installment will be held over Presidents’ Day weekend, February 14 through 17, and will spotlight M. S. Rau Antiques’ $9.6 million Royal Blue ring, which features a 10-carat blue diamond set with pink diamonds. Other highlights include a circa-1870 Henry Dasson lacquered commode ($200,000 or more) presented by Bu…