Diamond ore is a type of rock that contains valuable diamonds. These diamonds form deep within the Earth under high pressure and temperature over millions of years. The ore is typically found in volcanic pipes, which are formations created by ancient volcanic eruptions. To extract diamonds, miners often use methods like open-pit mining or underground mining. Once the ore is collected, it is processed to separate the diamonds from the surrounding material. The resulting diamonds can then be cut and polished for use in jewelry or industrial applications.