Diamond synthesis refers to the process of creating diamonds in a laboratory setting, mimicking the natural conditions under which diamonds form in the Earth. This can be achieved through methods like High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). Both techniques allow for the production of diamonds that are chemically identical to natural ones. The HPHT method involves applying extreme pressure and temperature to carbon, while CVD uses gas mixtures to deposit carbon atoms onto a substrate. These synthetic diamonds are used in various applications, including industrial cutting tools and jewelry, offering a more sustainable and ethical alternative to mined diamonds.