Lab-created diamonds are man-made diamonds. Simulants such as Cubic Zirconia and Moissanite are also man-made and look like diamonds but they have different physical and chemical properties and are not considered true diamonds.
Lab-created diamonds are grown in highly-controlled, laboratory settings that simulate the natural growing environment.
Lab-created diamonds are pure diamonds with identical characteristics as the diamonds found in nature. They exhibit the same excellent cut, color and clarity as well as identical physical, chemical and optical features as naturally-occurring diamonds.
There are several methods used to produce lab-created diamonds. The original method developed by GE uses high pressure and high temperature (HPHT) and is still in wide use because of its moderately low cost. The process involves large presses that can weigh hundreds of tons to produce high pressures needed to form a diamond.
The second method, uses chemical vapor deposition (CVD), which creates what is called a “carbon plasma” over a substrate (or bed) onto which the carbon atoms deposit to ultimately form diamonds.