TREND GAME Kite Runner Why fly one when you can wear one? Kite-shape diamonds are rising in popularity in finished jewelry. The silhouette appeals to those in the market for one-of-a-kinds (read: millennials), while the bold look is a no-brainer for designers to use in striking settings. It’s a fresh, still-uncommon cut, and the time is right for mainstream stores to embrace it.  Above: Rano ring in 14k rose gold with a 0.87 ct. diamond and 0.05 ct. t.w. colorless diamonds, $7,745, Julez Bryant, Vista, Calif., 760-931-1416, julez.com; rings in 18k gold with 0.6 ct. t.w. diamonds, 0.63 ct. t.w. diamonds, and 0.75 ct. t.w. diamonds, $4,250–$4,800, Goldhenn, Santa Fe, N.M., 502-465-3436, goldhenn.com; inset: Cyclone ring in 18k gold and oxidized sterling silver with 0.3 ct. bezel-set champagne diamond; $3,320; Elizabeth Garvin Fine Jewelry, NYC; 212-420-9470; egf