How is a lab-created diamond made?
Our lab-created diamonds are created using one of two different growing techniques that both result in a pure carbon diamond when complete. High-Pressure High-Temperature or HPHT is our primary growing process. Chemical Vapor Deposition or CVD is used more commonly for producing diamonds for industrial purposes and is also used for some man-made diamonds for finished jewelry purposes.
High-Pressure High-Temperature or HPHT:
HPHT recreates the natural growing environment found within the earth. There are a few different types of HPHT technologies used, but the process best suited for producing gem quality diamonds to be set in finished jewelry are created using a Bar press. The Bar press was invented by Russian scientists and uses a combination of inner and outer anvils to apply hydraulic pressure to the growth cell within the unit. The growth cell itself contains all the elements necessary to grow a diamond, including a tiny diamond seed, highly refined graphite and a catalyst consisting of a mixture of metals and powders. Consistent temperatures reaching 1,300 degrees Celsius and over 50,000 atmospheres of pressure are applied to the growth cell. Over a few days the elements within the growth cell melt and then reform during cooling to create a finished rough diamond ready to be extracted for cutting and polishing.
Chemical Vapor Deposition or CVD:
CVD environments use a small percentage of one atmosphere of pressure. Carbon based gases like methane are heated until the gases inside the environment break apart and allow the carbon atoms within the gas to separate. These tiny Carbon atoms fall onto a diamond substrate and, over a few days, build up layers resulting in a rough diamond crystal.