LESSON 6 - THERMAL TESTING 💎 A diamond thermal tester measures how quickly heat moves through a stone, one of the most reliable ways to identify a real diamond. Natural and lab-grown diamonds disperse heat almost instantly, which triggers a positive reading on the tester. Imitation stones, such as cubic zirconia or glass, conduct heat much more slowly, resulting in a very different response. This clear contrast makes thermal testing a trusted method used by jewellers to distinguish real diamond
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LESSON 6 - THERMAL TESTING 💎 A diamond thermal tester measures how quickly heat moves through a stone, one of the most reliable ways to identify a real diamond. Natural and lab-grown diamonds disperse heat almost instantly, which triggers a positive reading on the tester. Imitation stones, such as cubic zirconia or glass, conduct heat much more slowly, resulting in a very different response. This clear contrast makes thermal testing a trusted method used by jewellers to distinguish real diamond
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