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Alexandrite

Tsarstone collectors guide

American Gemological Laboratories

Provides independent coloured gemstone identification reports on all coloured gemstones including emeralds, rubies, sapphires and alexandrites.

American Gemological Laboratories, Inc.
Homepage Address Contact
www.aglgemlab.com/ 580 5th Avenue
#706
New York 10036
United States of America
N: Kathryn Bonanno-Patrizz
T: 212 704-0727
F: 212 764-7614
E: agl@aglgemlab.com

American Gemological Laboratories is a unit of Collectors Universe, the leading provider of value-added authentication and grading services for high-value collectibles and gemstones, which was founded in 1986 and publicly traded since 1999. In 1977, American Gemological Laboratories, also known as AGL Gem Lab, became the first laboratory in the world to quantify coloured stones in a linear, comparative manner.

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