The Rapaport GemTalks series continues next week with an episode on identifying colored gemstones. Nicole Ahline, supervisor for colored stones at the Gemological Institute of America (GIA), will join Rapaport Senior Analyst Joshua Freedman to discuss how experts identify and describe pieces, detect treatments, and discover a stone’s geographical origin. Ahline will explain the GIA’s processes, how it uses gemological tests and equipment, and ho…
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