Learn to Use a Diamond Tester and Chelsea Filter (Video) - Gem Society
Learn to Use a Diamond Tester and Chelsea Filter (Video) - Gem Society
May 26, 2020
gemsociety.org
How to tell if an emerald is Colombian (Chelsea filter test explained) The Chelsea filter is one of the quickest tools jewelers use to begin identifying emerald origin. If the stone flashes red under the filter, it might be Colombian because of chromium content — and if it stays green, it’s usually Zambian. It’s simply step one before spectroscopy, trace-element analysis, and lab testing — and yes, I already know the comments are going to come for me on this one. #Emerald #colombianemeralds #ass
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