If lab diamonds are the same chemically as natural, how do diamond testers work?

Question

By diamond testers I mean the ones from videos online that lights up all the way if a diamond is real. How do lab grown not also set those off?

In: 15

Answer 1

Diamond testers can’t tell natural from synthetic, and they don’t try. Lab diamonds are not “fake”. What the diamond testers do is tell diamonds apart from things that are not diamonds, like cubic zirconia. Telling a lab diamond apart from a natural one requires a much more sophisticated approach than the testers can typically perform with current technology.