Basically, synthetic diamonds are manufactured in the labs using two effective methods. One of them is the high pressure and the high temperature method also called the HPHT method wherein heavy pressure of 5 GPA and high temperature of around 1500 degree Celsius is used. A belt press and a cubic press is used in the manufacturing of such diamonds. Chemical Vapor Deposition or CVD is another effective method that is used in creating man made diamonds. Introduced in 1980, this method utilizes various gases along with the apt condition for creating man made diamonds.
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