Diamonds have been produced for hundreds of millions of years. It is a volcanic rock cooled by ancient magma. Diamonds are buried deep in the ground. Because of the volcanic eruption, they saw the light of day again. When the volcano erupts, the magma brings the underground diamonds near the surface, and then the diamonds can be discovered by human beings. The newly mined ore needs to be screened many times to get diamonds from it, and only 20% of the diamonds we use for jewelry. Most diamonds can only be used for industrial cutting and other purposes because of their low purity, so the collection of diamonds is very low, which is why diamonds are valuable.
There are diamond mines all over the world, but the diamonds in the world mainly come from Australia, Congo, Russia and South Africa. All are famous diamond producing areas. In the long-term mining process, it is found that the possibility of finding diamonds in garnet and olivine is relatively high, so these two minerals are used as guides to find diamonds. The largest diamond found in China is Jinji diamond, weighing 28 1.25 carats, which was found in Shandong, China.
Due to the scarcity of diamonds, many people like to collect diamonds, but the value of diamonds is affected by purity, size and other aspects, so we should consider carefully when collecting diamonds.