How Are Lab-Grown Diamonds Certified And Graded? Some lab-grown diamonds undergo grading and certification similar to natural diamonds by adhering to the the 4Cs of cut, 명쾌함, 색상과 캐럿. After being sent to a gem lab that specializes in grading diamonds, lab-grown diamonds are graded independently by several of the lab’s gemologists. Afterward, 그만큼 […]
