Accessibility options

Switch to preferred accessibility theme:


Increase or decrease the text size:

  • Internet Explorer: View > Text Size > Largest

Keyboard navigation and access keys:

  • A - Accessibility options
  • 0 - Skip navigation
  • 1 - Home
  • 2 - Alexandrite chapters
  • 3 - Alexandrite directory
  • 4 - Alexandrite forums
  • 5 - Alexandrite gemstones
  • 6 - Alexandrite localities
  • 7 - Contact information
  • 8 - About Alexandrite Guide
  • 9 - Sitemap
  • Press ALT + Access Key, then ENTER.

Close

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.

Page 11 of 14 Back to Top << >>
First ... 2 3 4 5 6 7 8 9 10 11 ... Last

Be first to comment

600 characters left, NO HTML, Comments are moderated and will be posted if they are on-topic and not abusive.
Your e-mail will not be published, but must be valid. In order to reduce the amount of spam, we will send you an email message containing a link to confirm your comments publication. Unconfirmed comments will be not published and removed from our system within 3 days.
Please help us to prevent automated requests by entering the code shown in the picture box. Can´t read this image? Get new verification code
Close options details