Crater, one grain, one diamond story

At the southern end of Africa, there is a country called South Africa, which used to be the country with the largest diamond production in the world. In 1867, a shepherd baby picked up a shiny pebbles by the river. The size of the peanuts, recognized by an Englishman, is an expensive diamond.

The news spread to all parts of the world, and thousands of Europeans swarmed to South Africa. They are crazy, dig and dig around, but few people encounter diamonds. Someone was too tired to rest next to a collapsed dirt house and suddenly found a piece of diamond falling from the earth wall on the ground. From then on, everyone focused on all the earth walls.

Not long after, countless earthen houses were destroyed and no diamonds were found. Later, when some people slaughtered ducks, they found a lot of millet-sized diamonds in a duck scorpion. So the ducks here were all smashed and killed. However, most people still have nothing to gain. Later, a young man with a brainstorm found that the earthen house with diamonds is quite special and blue. It is necessary to find blue soil first.

He went over the mountains, slumbered, and ate a lot of suffering. After a bitter sweetness, a large piece of blue earth was finally discovered, and a lot of diamonds were found in the blue soil. It turned out to be a diamond mine that had never been mined. Under the blue soil layer, there is a rock that does not know the name. In this rock, there are countless small "stars", one star is a diamond.

Soon there was a city called Kimberley, which was also called Kimberly Rock. Only this kind of rock produces diamonds, it is the mother of diamonds. Many years have passed and the mine has turned into a large vertical pit. The pits are as large as several football fields, 900 meters deep, and have been mined for more than 40 years. The diamonds produced can hold a large car with a total weight of about 15 million carats.

After in-depth investigation and research, the geologists concluded that the crater was originally the volcanic crater. The volcanic neck, also known as the rock tube, is the channel for magma eruption. When magma erupts, the pressure near the rock is very large, and diamond can only be formed in such a high temperature and high pressure environment.