When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Turn on the power of the tester and heat the probe. It usually takes 20 seconds to touch the hot needle to the surface of the sample. The red light will be shown and the audio indicator will ring if the stone is a real diamond.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.