Customers who have never shopped for diamond rings often ask what a heart diamond promise ring is and how it is different from a diamond engagement ring. To put it simply, diamond engagement rings are usually used for only a single purpose, which is to propose to your loved one for marriage. On the other hand, couples usually exchange diamond promise rings in order to show their commitment to one another. A diamond engagement ring is usually gifted to women at the time of proposal while a diamond promise ring can be gifted at any stage of a couple’s relationship. This is what makes a diamond promise ring unique from engagement rings. In other words, if you are planning to propose to the special person in your life, it is best to get her a diamond engagement ring. However, if you wish to show your love and commitment to your loved one, but are not yet ready to tie the knot, you should consider settling for a heart diamond promise ring.