CAN’T-MISS COLLECTION True Story Rio Tinto recently unveiled a batch of new designs for its 2015 Diamonds With a Story campaign whose aim is to impress upon retailers the importance of featuring great design in diamond jewelry. Pieces from Sandy Leong, Jennifer Dawes of Dawes Design, Suzanne Kalandjian of Suzanne Kalan, and Matthew Campbell Laurenza of M.C.L feature natural-colored diamonds from Rio Tinto’s Argyle mine, and many styles epitomize the vogue for nontraditional engagement rings. In this case, talk is anything but cheap. Relic Vine bands in 18k gold with 0.02 ct. t.w.–0.13 ct. t.w. natural-color diamonds; $825–$1,265; Dawes Design for Diamonds With a Story, Santa Rosa, Calif.; 888-802-0880; dawes-design.com HOT STOCK TIP Pretty Sweet Elisa Solomon’s dainty, organic platinum jewels are ideally positioned as chic entry