<P> Numerous claims of diamond synthesis were documented between 1879 and 1928 ; most of those attempts were carefully analyzed but none were confirmed . In the 1940s , systematic research began in the United States , Sweden and the Soviet Union to grow diamonds using CVD and HPHT processes . The first reproducible synthesis was reported around 1953 . Those two processes still dominate the production of synthetic diamond . A third method , known as detonation synthesis , entered the diamond market in the late 1990s . In this process , nanometer - sized diamond grains are created in a detonation of carbon - containing explosives . A fourth method , treating graphite with high - power ultrasound , has been demonstrated in the laboratory , but currently has no commercial application . </P>
<P> Numerous claims of diamond synthesis were documented between 1879 and 1928 ; most of those attempts were carefully analyzed but none were confirmed . In the 1940s , systematic research began in the United States , Sweden and the Soviet Union to grow diamonds using CVD and HPHT processes . The first reproducible synthesis was reported around 1953 . Those two processes still dominate the production of synthetic diamond . A third method , known as detonation synthesis , entered the diamond market in the late 1990s . In this process , nanometer - sized diamond grains are created in a detonation of carbon - containing explosives . A fourth method , treating graphite with high - power ultrasound , has been demonstrated in the laboratory , but currently has no commercial application . </P>
when was the first man made diamond made
when was the first man made diamond made
around 1953
around 1953