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Tsarstone collectors guide

AGTA Gemological Testing Center

Provides identification and origin reports and other colour gemstone services, including testing for beryllium in sapphire, natural origin of colour in diamonds and country of origin for sapphires, rubies and alexandrites.

AGTA Gemological Testing Center
Homepage Address Contact 18 East 48th Street
Suite 502
New York 10017
United States of America
N: Harry Freidman
T: 212-752-1717
F: 212-750-0930

The AGTA Gemological Testing Center is the natural coloured gemstone industry’s premier independent laboratory providing the industry and the public with a complete range of services, including gemstone identification, origin determination and pearl identification. The laboratory, located in New York City, is equipped with the latest, technologically advanced, investigative equipment.

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