Words are important. Tester vs.Detector! The way to differentiate a Natural Diamond from a Lab Grown Diamond is to use a Detector. Those “pen style “ devices can not differentiate a ND from a LGD. Detectors are expensive ($3,500 - $6,000) and DeBeers recognizes the need for its jewelers to have a Detector, so in October 2024 DeBeers will sell jewelry stores and inexpensive Detector. Until then, the Yehuda brand offers their Sherlock Holmes Detector and their Mr. Watson Detector.

Are there any testers in the $200-$300 range that are close enough? Even against an F1 Moissanite?

Someone a few days ago that owns a twenty dollar diamond tester bought a ring with stones so ugly i immediately knew it was real, symmetry was so bad it wouldn't grade poor, no sparkle and you could see carbon despite its obvious treatment. Guessing he bought it from a guy in a trench coat. 😂

To much info thanks