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Assaying & Hallmarking
Gemology Certificate, Diamond Grading Certificate
American Gemological Laboratories (AGL) is an international gemstone testing facility specializing in comprehensive colored gemstone analysis. AGL provides detailed identification and enhancement reports, country-of-origin reports, as well as complete colored stone analysis documents tailored to gems of unique importance. AGL is a pioneer in the colored gemstone industry and was the first gemological laboratory in the USA to issue country-of-origin reports. Additionally, we were the first in the world to quantify colored stone quality in a clear and comparative manner. In addition to our position of leadership in gemstone documentation, AGL has extensive experience in consumer protection programs. The Laboratory is equipped with state-of-the-art instrumentation, and applies standard gemological, as well as advanced analytical, techniques to each determination it makes. Building on our cornerstones of meticulous characterization and disclosure, AGL has a long tradition of acquiring staff who are experts in the field of gemstone testing and reporting.
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