LUXURY Miami debuts Oct. 14–16 at the Miami Beach Convention Center. Don’t miss these five exhibitors: 1. Duo collection ring in 14k yellow and white gold with diamonds; $5,288; Effy, NYC; 212-944-0020; effyjewelry.com 2. Drop earrings in 18k gold with 4.42 cts. t.w. Paraiba tourmaline and 3.58 cts. t.w. diamonds; $30,030; Simon G., Glendale, Calif.; 818-500-8595; simongjewelry.com 3. Open ring in 18k gold with 0.94 ct. t.w. diamonds; $5,000; Doves by Doron Paloma, Great Neck, N.Y.; 888-663-6837; dovesjewelry.com     4. Venus pendant necklace in 18k yellow gold with abalone shell and 1.06 cts. t.w. diamonds; $7,995; Frederic Sage, Great Neck, N.Y.; 800-651-1810; fredericsage.com   5. Géométrique bracelet in 18k gold with whiskey citrine,&nb