.16 Contoured Art Deco Diamond Wedding Band in Platinum.  This antique Art Deco wedding band features .16 carats of diamonds finished on a contoured platinum band. The primary diamond weighs .055 carats and is accented by two (2) .04 carat and two (2) .015 carat diamonds. The diamonds are set in thick, stylish platinum prongs. Measuring 2.42 mm in width, this ring would look great as a wedding band or as one in a set of stacking bands.