Lab-created diamonds are graded in exactly the same way that mined diamonds are. That means your lab-grown diamond will come with a report from a trustworthy independent laboratory detailing the diamond's 4 Cs - cut, color, clarity, and carat weight. Ritani's lab-grown diamonds are graded by the most reputable and renowned grading institutes, such as the International Gemological Institute IGI and the American Gem Society (AGS).