Your left hand will be the center of attention with these blinged-out bands, offbeat settings, and unconventional cuts. MIXED CUTS PRIMA BALLERINA (Top) Semi-mount in 18k white and rose gold with 0.77 ct. morganite and 0.68 ct. t.w. diamonds; $3,303; Doves by Doron Paloma, Great Neck, N.Y.; 888-663-6837; dovesjewelry.com PEAK PERFECTION (Inset) Ruda ring in 14k gold with 1.23 cts. t.w. diamonds; $14,495; Julez Bryant, Vista, Calif.; 760-931-1416; julez.com FLY KITE Jester ring in 18k yellow gold with a 3.94 ct. smoky quartz, 2.39 cts. t.w. red kite-shape garnets, and 0.1 ct. t.w. diamonds; $3,365; Jane Taylor Jewelry, Amherst, Mass.; 413-687-3153; janetaylor.com   A MIGHTY HEART Myra ring in 18k white gold with a 4.59 ct. heart-shape Colombian emerald, 0.81 ct. t.w. marquise-cut diamonds, 0.53 ct. t.w. pear-shape diamonds, and 0.69 ct. t.w. br