The most well known gemological laboratories are listed below and all of them are equipped to test alexandrite. Most gemological laboratories only identify gemstones, they do not appraise them.
|Gem Studies Lab||European Gemological Laboratory||Hong Kong Gems Laboratory|
|Zenhokyo||The Russian MSU Gemological Center||AIGS Gemological Laboratory
The Gem and Jewelry Institute of Thailand
Gubelin Gemological Laboratories
|AGTA Gemological Testing Center
American Gemological Laboratories
Gemological Institute of America
|Gemological Association of Great Britain|
A good appraisal takes time, expertise and a lot of experience especially with alexandrite. Jewelry stores who offer some sort of verbal appraisal aren´t doing their job properly and when appraiser´s first claim is that "you paid to much for that gemstone", then you are not getting an appraisal, but you are a victim of a practice known as low-balling. Your best choice is a professional appraiser from a major appraisal organizations, with standards of education and codes of ethics. To protect the client they use methodologies that provide some assurance of accuracy.
|Jewellers Vigilance Canada (JVC)||The National Association of Jewelry Appraisers
The International Society of Appraisers
The American Society of Appraisers
|National Association of Goldsmith
The Association of Jewellery Appraisers