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

Lab grown diamonds are shown to be real when tested. The testers cannot tell the difference between a natural and lab grown diamond. The tester can detect fake diamonds, like those made of glass etc.