How to Test for Diffusion Treated Gems
Learn how to spot diffusion treated gems with a simple immersion test. This common treatment for sapphire can significantly reduce their value…
Ruby-Glass Composites vs Leaded Glass Clarity Enhancements
Ruby-glass composites and leaded glass ruby clarity enhancements are difficult for gemologists to detect. Learn how to identify these gems and…
Gemstones and Refraction Liquids
Gemologists use refraction liquids to identify gemstone refractive indices (RI). Learn about the properties of these liquids and safe RI testing…
HPHT Diamond Treatments
HPHT diamond treatments can only be positively identified with costly equipment. However, you can learn to assess the probability that a stone…
A Beginner’s Guide To Common Gemstone Heat Treatments
Gemstone heat treatments can increase the beauty and value of many rough pieces. Learn how to conduct the most common procedures safely.
Are Diamonds Really Rare? Diamond Myths and Misconceptions
Diamonds are popular gemstones surrounded by popular misconceptions. We’ll tell you how they became so prized and debunk some of those diamond…
How Can Gem Buyers Protect Themselves from Fraud?
How can gem buyers avoid undisclosed gem treatments and substitutions? Learn why it’s best to deal with expert gem cutters rather than commercial…
Interview with Gemology Tools Expert Cara Williams
What’s working in a gem lab like? Gemology tools expert Cara Williams talks about the challenges as well as the most useful equipment for identifying…
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