Last week I attended the 6th GIA Symposium, which was about research and business of gem materials. I mainly attended the research track, especially colored stone and pearl research. I also was able to attend the field trip to some Pala mines prior to the Symposium.
My poster, intended for gem dealers, explains what mineral collectors are looking for in a specimen. Some gem rough can be sold as mineral specimens, but the proper material must be recognized and marketed appropriately.
Email me at email@example.com if you would like a copy of the PDF file.