What is diamond?

Primary diamonds are crystallized deep underground (130-180Km) under high temperature (900-1300℃) and high pressure (45-60)×108Pa. They are stored in kimberlite or eclogite, and their formation is quite old. . In South Africa’s Kimberley mine, peridotite diamonds were formed about 3.3 billion years ago, which is almost the same age as the earth; while the Argyll mine in Austria and the Orab mine in Botswana, although the eclogite-type diamonds are young, It has been 1.58 billion years and 990 million years, respectively. The diamond crystals hidden in such a large underground depth for hundreds of millions of years have to be seen again, and they have to help volcanic eruptions. The lava flow brings diamond-containing magma to the surface of the earth, or migrates long distances to the river sand. Among. The former formed primary tubular ore, while the latter formed alluvial ore. After these ore bodies have gone through arduous mining, they need to go through multiple treatments and selections before they can get rough diamonds from them. Only about 20% of rough diamonds can be used as diamond blanks for jewelry, and most of them can only be used for industrial purposes such as cutting, grinding and polishing. Someone once roughly estimated that to get 1ct diamonds, at least 250 tons of ore must be mined and processed, and the recovery rate is quite low; if you want to select beautiful diamonds from polished diamonds, the ratio between the two is very different. Of it.

It is known that there are only more than 30 countries and regions in the world that produce diamonds, and the distribution is extremely uneven, mainly in Australia and Africa, followed by Asia and South America. Among them, Australia, Zaire, Botswana, the former Soviet Union and South Africa are the world's top five diamond producers, accounting for more than 80% of the global diamond supply.

Although my country's diamond mine development has a long history, diamonds have been discovered in Taoyuan, Changde, and Tancheng District in Shandong during the Daoguang period of the Qing Dynasty. In the middle of the 20th century, diamond placers were also found in Hunan. However, the primary diamond deposits were only discovered in Wafangdian, Liaoning, Mengyin, Shandong and eastern Guizhou during the 1960s and 1970s.

Things are rare and expensive. Looking at the world today, the distribution of diamonds is small and the output is low. Coupled with the difficulty of mining, natural diamonds are even more precious. A diamond, from being bred in the magma of the earth's crust to being worn on your hand, travels thousands of miles, passing by hundreds of people. It is difficult and complicated to mine and process. It is an artistic creation to make exquisite jewelry. After you know it and wear it, you can show it off to the world again. Therefore, what a peculiar blessing is this!

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