Ultraviolet light sources for testing gem fluorescence have been a staple piece of gem equipment for decades. Emerging technologies will not only change the way you look at ultraviolet but will eventually redefine our industry…
Featured ArticlesEvery year, tourists purchase jewelry from port town shops, major city tourist areas, and even from cruise ships, either on board or at a recommended local store. The vacation is a great memory until they…
News ArchiveRecently we examined a custom-made ring that contained a cushion cut center diamond surrounded by 28 round fancy pink melee. The ring also contained other round brilliants in the setting. We estimated the center diamond…
Gem NotesRecently a subscriber submitted a cushion cut yellow sapphire weighing 5.13 carats for an estimate of wholesale value. The stone exhibited a fairly even yellow color consistent with GIA GemSet Y4/5. Our initial examination was…
Gem NotesThe lead article in this newsletter on Disclosing and Explaining Treatments has references to the availability pyramid shown below. Along with this chart is a theoretical value chart based on treatment. These charts illustrate the…
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