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Precious Gem and Diamond Grading News

Stay current on how PGTL remains at the cutting edge of precious gem reporting, grading, and certification.

ABOUT PGT LABS Precious Gem and Diamond Testing, Grading, and Certification

Precious Gem Testing Laboratory (PGTL) was established, diamond and precious gem owners in Sri Lanka and India had limited ability to accurately test, grade, and value their stones. They were faced with outdated equipment, antiquated methods, and a general lack of clarity. PGTL has changed this. At our state-of-the Read More..

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