Lab-grown diamonds are also created using extreme pressure and heat, but inside a machine rather than the bowels of the Earth. There are two ways to grow a diamond. ... More recently, another way to grow a diamond was discovered, called Chemical Vapor Deposition (CVD).

Is it illegal to make diamonds?

According to the FTC, it is illegal to use the term “diamond” for a lab-grown diamond unless you add a descriptor that makes it clear that it is lab-made and not natural.

Can you artificially make diamonds?

HOW ARE SYNTHETIC DIAMONDS MADE? ... Synthetic diamonds are man-made in a lab; a scientist will place the element carbon under high-pressure and high-temperature to form a diamond crystal. Another way to form a synthetic diamond would be through a chemical vapour deposition.