The short answer is yes. Lab-grown diamonds are assessed by either The Gemological Institute of America (GIA) or The International Gemological Institute (IGI), two of the oldest companies in the diamond business. These organisations grade on the 4 Cs to ensure every diamond is 100 percent authentic.
Warch recommends getting a certification of authenticity when buying any diamond, be it mined or lab-grown. "All of our diamonds above 1/2 carat receive a Diamond Authentication Certificate from the IGI or GIA, which provides a third-party, unbiased reassurance of what you are buying," she says.