Other National clay groups
Association Internationale Pour l'Etude des Argiles (AIPEA)
The Clay Minerals Society (USA - CMS)
German-Austrian-Swiss Clay Group (DTTG)
Clay Minerals Group of the Mineralogical Society (UK - CMG)
Latvian Clay Science Society (LCSS)
The Clay Science Society of Japan (CSSJ)
Clay Science Society of Turkey (Site mostly in Russian)
Images of clays (from Min. Soc. UK)
You want to assess your current practices for quantitative phase analysis? The Clay Minerals Society organizes a bisannual Round Robin: The Reynolds cup, a friendly contest that will allow you to compare the quality of your current practices and results with those of other laboratories, both private and from academia, worldwide.