During the CVD process, inside a controlled lab environment, very pure gas rich in carbon, is reheated to 2,000 degrees Celsius, and atoms are deposited on a substrate and generate the crystal of a rough diamond. Once extracted from the CVD lab, the crystals that have become diamonds can be processed into the final product. In some cases, diamonds for alternative applications to jewellery, can be subjected also to a high heat and pressure treatment. The result is pure technology! In six days the diamonds reach sizes equivalent to around 15 carats weight with a level of hardness 50 times superior to that of natural diamonds. The CVD process finds applications also in the optical and electronic semi-conductor sectors that used silicon.