How are lab-grown diamonds made?

On average, to extract one carat of diamonds, at least two tons of Kimberlite must be processed and in alluvial deposits, twenty tons of sand must be sifted.

How is a lab-grown diamond created?

HPHT method

Over the years, thanks to advanced technology and sophisticated machinery, humans have managed to recreate in the laboratory the conditions that naturally give rise to diamonds. By subjecting a diamond "seed" to a carbon source, generally graphite, at high pressure and temperature, the carbon atoms arrange themselves according to the diamond structure, and in a short period of time, the growth and formation of a rough diamond occurs.

This method is called HPHT (High Pressure High Temperature). Once a rough cultured diamond is obtained, it will be cut with the same techniques used for natural diamonds.

CVD method

Another method for creating diamonds is Chemical Vapor Deposition ( CVD). A diamond "seed" is introduced into a highly controlled temperature growth chamber, where a gas containing hydrogen and carbon molecules (usually methane) is added. The gas decomposes, releasing a cloud of carbon that is deposited on the seed, growing layer by layer, thus creating a rough diamond.
This method has also been used to create the extremely rare yellow, pink, and blue diamonds. Even lab-grown diamonds can exhibit varying color and clarity characteristics during their formation. As with mined diamonds, the rough diamond will be expertly cut by a skilled craftsman, achieving the characteristic fire and brilliance that only a diamond can provide.