This library of publications contains most of our research that has been published since 1974. This goes hand in hand with our mission to share our gemmological knowledge and findings with the public and the trade.


We hope this resource is helpful and welcome any feedback. We are grateful to the many journals and magazines who have permitted us to put this work online.


Some publications are not in English language but do include an abstract in English. Certain publications have only the first page visible online for copyright reasons. If you would like a full version of an article, please contact us.