It is very rare for diamonds to form and be there for your 1 5 ct diamond ring, which is one reason why these stones hold so much value. Like almost any resource, diamonds are mined around the world. However, the history surrounding diamonds is not free of conflict; in fact, it is quite the opposite. Most of the diamond mines in the world are in war-infested Africa, meaning that there is a lot of bloodshed that results from the transference of these valuable stones.