There is no denying the fact that heart shaped diamonds are unique and a powerful symbol of love. These diamonds are commonly used in promise rings and in solitaire pendants. The shape of a heart is difficult to perceive in smaller diamonds. Therefore, if you are interested in buying heart-shaped diamonds it is advised that you buy at least a 2 carat diamond. If you are using small heart-shaped diamonds, it has to be set in a three-prong setting or a bezel setting, to preserve the diamond shape outline better. When planning to buy heart shaped diamonds, here are a few things that you need to consider: