Pass Diamond Tester *Guarantee*
WHAT IS A DIAMOND TESTER?
When someone refers to a “diamond tester”, most people mean a handheld “pen” tester that measures a gemstone’s thermal conductivity. In other worse, how a gem handles heat. These testers use a small metal point which, when put on a gem’s surface, measure how quickly heat travels through the stone. People use these to test diamonds because diamonds have super high conductivity.
DO DIAMOND TESTERS REALLY WORK?
Diamond testers can be a helpful tool as part of a multi-stage test, but should not be solely relied upon. These little pens are a helpful way to separate out CZ from diamond. But that should be the beginning and end of their use. Why? Because other gems also have high conductivity (such as moissanite) and because the testers themselves notoriously malfunction. Reasons I have seen these testers fail include user error (stones will not test correctly if the point touches metal), low battery, or age/abuse of the pen.
CAN MOISSANITE DIAMOND PASS TESTER?
Yes, some diamond simulants can pass a diamond tester. For example, moissanite, a man made gem, may pass as a diamond on a standard tester pen. This is because moissanite also has very high thermal conductivity! Other diamond simulants, such as CZ, will not pass the tester. So, it’s important to use multiple tests to confirm your stone!
We guarantee that all Moissanite Diamonds bought from Verglacé will pass a diamond test, if not we will provide a full refund or exhange for a newly made jewelry with moissanite diamonds.