The Limited Supply
Diamond mines have life cycles. At their peak, they produce a steady supply of good quality stones, which can be affordably made into fine jewelry. But over time those higher-quality diamonds become harder and harder to find. Eventually, it becomes too expensive to keep digging and the mine is closed down. If that was the only source of a particular type of diamond, the price can rise dramatically. The Agyle Mine in Australia, which produces most of the world’s Chocolate Diamonds® , is a case in point. These diamonds are formed deep in the earth, where they are subjected to pressure and temperature that gives them their natural color. Sometimes, volcanic activity brings the diamonds to the surface, though most remain buried deep.