When did synthetic diamonds appear on the market?

1954, synthetic diamonds were successfully synthesized for the first time. At that time, a group of researchers from General Electric Company made a diamond in the laboratory. They imitated the environment in which diamonds were formed in nature and subjected carbon to extremely high temperature and pressure. Also in the 1950s, another method of making synthetic diamonds was successfully developed. This method is called chemical vapor deposition (CVD), which deposits carbon in carbon-containing mixed gas into diamond matrix at very low pressure and relatively low temperature.