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Alexandrite

Tsarstone collectors guide

American Gem Trade Association

A group of US and Canadian professionals dedicated to promoting the natural colored gemstone and cultured pearl trade

AGTA
Homepage Address Contact
www.agta.org 3030 LBJ Freeway
Ste. 840
Dallas 75234
United States of America
N: Joshua Garcia
T: 214-742-4367
F: 214-742-7334
E: info@agta.org

Founded in 1981, the American Gem Trade Association is a group of US and Canadian professionals dedicated to promoting the natural colored gemstone and cultured pearl trade while maintaining the highest ethical standards among its members and within the industry.

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Bibliographic details
Page title American Gem Trade Association
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 12 August 2011 01:18 UTC
Date accessed 07 July 2026 17:00 UTC
Permanent link http://m.alexandrite.net/viewpage.html?id=WDD-003-00038
AMA style
David Weinberg. "American Gem Trade Association". In Alexandrite Tsarstone Collectors Guide. August 12, 2011, 01:18 UTC. Available at: http://m.alexandrite.net/viewpage.html?id=WDD-003-00038. Accessed July 07, 2026.
APA style
"American Gem Trade Association". (2011, August 12). In Alexandrite Tsarstone Collectors Guide. Retrieved 17:00, July 07, 2026, from http://m.alexandrite.net/viewpage.html?id=WDD-003-00038.
Bluebook style
"American Gem Trade Association", http://m.alexandrite.net/viewpage.html?id=WDD-003-00038 (last visited July 07, 2026).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "American Gem Trade Association", http://m.alexandrite.net/viewpage.html?id=WDD-003-00038 () (as of Jul. 07, 2026, 17:00 GMT).
CBE/CSE style
David Weinberg. "American Gem Trade Association". In Alexandrite Tsarstone Collectors Guide. 2011 Aug 12, 01:18 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2011 Aug 12, 01:18 UTC [cited 2026 Jul 07]. Available from: http://m.alexandrite.net/viewpage.html?id=WDD-003-00038.
Chicago style
David Weinberg, "American Gem Trade Association", http://m.alexandrite.net/viewpage.html?id=WDD-003-00038, (accessed July 07, 2026).
MLA style
"American Gem Trade Association". Alexandrite Tsarstone Collectors Guide. 12 Aug 2011, 01:18 UTC. 07 Jul 2026 http://m.alexandrite.net/viewpage.html?id=WDD-003-00038
MHRA style
David Weinberg, "American Gem Trade Association", Alexandrite Tsarstone Collectors Guide, 12 August 2011, 01:18 UTC, http://m.alexandrite.net/viewpage.html?id=WDD-003-00038 [accessed 07 July 2026].
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