The three-stone setting is a versatile setting that can be used for engagement, anniversary, or any occasion. The three stones, set closely together, are said to symbolize the couples past, present, and future. These stones can either be all the same size or, as is often the case, the center stone is larger than the two side stones. The most popular diamond shapes for this setting are the round brilliant cut and the princess cut. Its possible to personalize this setting with colored sidestones, such as sapphires, rubies, emeralds (see photo below), or other birthstones. Pros of a Three Prong …