Diamond resources are limited in the world. Up to now diamonds have been found in all the continents except Antarctica, but diamond deposits are found only in about 40 countries. Generally, Africa, Oceania and Asia are endowed with more diamond resources. According to the report of the US Bureau of Mines, the world’s diamond reserve base is 1900 million carats. The countries with more reserves are in successive order Australia, Congo (Kinshasa), Botswana, South Africa and Russia. Among the major producers, the production of gem diamonds in Namibia accounts for over 90% of the total annual production, in Russia about 26%, in South Africa about 25%, in Botswana about 19%, and in Australia and Congo (Kinshasa) about only 5%.
China is one of the countries whose diamond resources are scarce. Although diamonds have been found in 17 provinces (regions), explored reserves are available only in Liaoning, Shandong, Hunan and Jiangsu. Up to the end of 1997, 24 diamond occurrences have been explored throughout China, with categories B+C+D diamond reserves of 4,746.69 kg (or 23.7335 million carats), of which categories B+C reserves are 2,480.23 kg (or 12.4012 million carats). Except the Xiaobuling placer diamond mine at Tancheng County, Shandong Province, which has been closed, there are 23 diamond occurrences with retained reserves; they have categories B+C+D retained diamond reserves of 4,145.13 kg (or 20.7257 million carats), of which categories B+C retained reserves are 1,889.83 kg (or 9.4492 million carats). In comparison with the diamond reserve bases of some countries, China ranks about 9th to 10th. But the levels of exploration and availability of China’s retained diamond occurrences are relatively high. The reserves of the occurrences that have undergone target exploration, detailed reconnaissance and general reconnaissance account for 78.6%, 20.2% and 1.2% of the total reserves respectively. The retained reserves that have been used and can be used in the near future take up 84% of the total reserves and those that are difficult to use amount to 16% of the total. China’s explored diamond reserves were mainly obtained in the period from 1964 to 1980, and after 1985, although the explored reserves did not increase, marked progress was made when great efforts were made to implement the diamond prospecting plan. For example, two diamond-bearing kimberlite bodies (Nos. 109 and 110) were found in eastern Liaoning, and their industrial value remains to be further ascertained; diamond and pyrope were found in a volcanic terrain at Xiaobuling, Shandong; diamond was found in 17 provinces (regions) such as Shandong, Hunan, Liaoning, Jilin, Shanxi, Hebei, Guizhou, Jiangsu, Jiangxi, Xinjiang, Inner Mongolia and Tibet; lamproite was found in Guizhou, Hebei, Hubei, Hunan and Shanxi, and diamond was found in lamproite at Taoyuan, Hunan; diamond-bearing peridotite was found in Tibet. All these indicate that China has the geological conditions for forming both kimberlite-type and lamproite-type primary diamond deposits.Henan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,jaw breakers,flotation cells Welcome all of you to visit our official website.rock crushing plant:http://www.crusher-machine.com/stone-production-line.html