Be cute and coy in Priscilla of Boston’s Platinum Collection above-the-knee silk- organza dress with bias bands (ice cream cone not included), $2,950 at Priscilla of Boston, Wynnewood. David Yurman New Albion diamond and prasiolite ring, $1,400, Silver Ice prasiolite bracelet, $1,500, and Quatrefoil 18-karat white-gold and diamond earrings, $2,600, at McNelis & Sherry, Haddonfield. Scarf, stylist’s own.