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.
| Australia | Canada | China |
|---|---|---|
| Gem Studies Lab | European Gemological Laboratory | Hong Kong Gems Laboratory |
| Japan | Russia | Thailand |
| Zenhokyo | The Russian MSU Gemological Center | AIGS Gemological Laboratory
The Gem and Jewelry Institute of Thailand |
| Switzerland | USA | UK |
| GemResearch Swisslab
Gubelin Gemological Laboratories SSEF |
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.
| Australia | USA | UK |
|---|---|---|
| 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 |