In recent years, laboratory-grown also known as engineered diamonds have become more common, more advanced, and harder to detect.

A laboratory-grown diamond is the result of a technological process, as opposed to the geological process that creates natural diamonds. They are grown in highly controlled laboratory environments using advanced technological processes that duplicate the conditions under which diamonds naturally develop when they form in the mantle, beneath the Earth’s crust. Laboratory-grown diamonds have the same chemical composition, crystal structure, optical, and physical properties as diamonds found in nature. Most laboratory-grown diamonds are categorized as either high-pressure, high-temperature (HPHT), or chemical vapor deposition (CVD) diamonds, depending on the method of their production. Since HPHT and CVD diamonds are virtually identical to natural diamonds, differences only become clear when they are analyzed in a gem laboratory.