In an undated image provided by Serpentine, a toi et moi style ring. (Serpentine via The New York Times) Can’t decide on a pear-shaped or an emerald-cut diamond for your engagement ring? Or, perhaps a colored gemstone? An increasing number of couples who want more options in rings are choosing the toi et moi style, which features two stones instead of one, and in many cases, a mix of gems and cuts in creative settings. Advertisement Demand for the toi et moi (French for “you and me”) ring has risen sharply in recent years after these rings have been spotted...