Lab-grown diamonds and natural diamonds differ only in the environment in which they are created, and have exactly the same characteristics in terms of raw materials, chemical composition, optical properties, physical properties, and crystal structure. Even a diamond tester will tell you that a diamond is a real diamond, and even professional appraisers have difficulty distinguishing it from a natural diamond. Lab-grown diamonds are scientifically proven to be "real" diamonds, not merely "similar" looking stones such as cubic zirconia.
All diamonds over 0.5 ct come with a certificate of authenticity.The quality of each lab-grown diamond is certified by a certificate of authenticity issued by the International Gemmological Institute (IGI), which is recognized by diamond exchanges around the world for its strict quality standards.