A few sources for gemology education include:
- International School of Gemology (more expensive)
- IGS, International Gem Society (less expensive).
- Your Gemologist. This site features tons of information on the properties of individual minerals, gemstones, and much more.
I found on the late Jeff Graham’s site that his opinion was the money you’d spend at a course could be better spent buying equipment and teaching yourself. He may be right but you’d need to be the sort that really can self-teach so you don’t just buy equipment and then put it on a shelf for when you get a round-to-it. Read what Graham had to say on the subject and if you have an opinion, please send it in, or post a comment!