Lab grown diamonds are real diamonds and have the same physical and optical properties of natural diamonds. It is virtually impossible to distinguish with the naked eye and requires special equipment to identify a lab grown diamond. They are just as hard, and they are available in a range of colors and qualities. Just like natural diamonds, they can have an excellent cut—and, therefore, excellent fire, brightness and scintillation—or they can have a poor cut or anything in between just like with earth mined diamonds. It all depends on the quality of the diamond and the skill of the cutter.