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on 11/21/23Officially, lab diamonds have the same chemical and physical properties as natural diamonds and exhibit the same fire, sparkle, and brilliance. In fact, lab diamonds are so identical that most expert diamond graders need to use a machine to detect their origin (lab or natural). However, some people claim that they can see a difference, or that lab diamonds have a slightly bluer sparkle to them. Overall, the answer is that they look the same to most people.