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Precious mine

Precious mine

diamond
- the hardest natural substance known and one of the two crystalline forms of carbon -- has a variety of uses in industry. Since the first synthesis of diamond in the laboratory in 1956 by F P Bundy and others in 1956, there have been many attempts for producing diamonds in the laboratory. Now Xing-Zhong Zhao and collaborators of the Pennsylvania State University, us, have reported hydrothermal growth of diamond in the presence of nickel and vitreous carbon.

In industry and in nature, diamond can be made under conditions of high temperature and pressure. The pressure required is about 120 kilobars (one kilobar is one atmosphere) and a temperature of about 2000

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