Highly recommended for any lover of stone. I was turned on to this organization from a member on here. Joined in 2007. Been a member ever since and this will be my 4th symposium I'll be attending.
http://www.stonefoundation.org/symposiums/2014symp/2014symp.html
http://www.stonefoundation.org/symposiums/2014symp/2014symp.html