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Alexandrite

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
www.agta-gtc.org/ 18 East 48th Street
Suite 502
New York 10017
United States of America
N: Harry Freidman
T: 212-752-1717
F: 212-750-0930
E: info@agta-gtc.org

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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Bibliographic details
Page title AGTA Gemological Testing Center
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 12 August 2011 01:17 UTC
Date accessed 14 December 2018 17:21 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=WDD-003-00019
AMA style
David Weinberg. "AGTA Gemological Testing Center". In Alexandrite Tsarstone Collectors Guide. August 12, 2011, 01:17 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=WDD-003-00019. Accessed December 14, 2018.
APA style
"AGTA Gemological Testing Center". (2011, August 12). In Alexandrite Tsarstone Collectors Guide. Retrieved 17:21, December 14, 2018, from http://www.alexandrite.net/viewpage.html?id=WDD-003-00019.
Bluebook style
"AGTA Gemological Testing Center", http://www.alexandrite.net/viewpage.html?id=WDD-003-00019 (last visited December 14, 2018).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "AGTA Gemological Testing Center", http://www.alexandrite.net/viewpage.html?id=WDD-003-00019 () (as of Dec. 14, 2018, 17:21 GMT).
CBE/CSE style
David Weinberg. "AGTA Gemological Testing Center". In Alexandrite Tsarstone Collectors Guide. 2011 Aug 12, 01:17 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2011 Aug 12, 01:17 UTC [cited 2018 Dec 14]. Available from: http://www.alexandrite.net/viewpage.html?id=WDD-003-00019.
Chicago style
David Weinberg, "AGTA Gemological Testing Center", http://www.alexandrite.net/viewpage.html?id=WDD-003-00019, (accessed December 14, 2018).
MLA style
"AGTA Gemological Testing Center". Alexandrite Tsarstone Collectors Guide. 12 Aug 2011, 01:17 UTC. 14 Dec 2018 http://www.alexandrite.net/viewpage.html?id=WDD-003-00019
MHRA style
David Weinberg, "AGTA Gemological Testing Center", Alexandrite Tsarstone Collectors Guide, 12 August 2011, 01:17 UTC, http://www.alexandrite.net/viewpage.html?id=WDD-003-00019 [accessed 14 December 2018].
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