Lake Superior Rock Picker's Guide
Bruce Mueller is owner of the C&M; Rock Shop in Honor, Michigan. He holds a master's in geology from the University of Illinois. He is also the author of The Complete Guide to Petoskey Stones. Kevin Gauthier is a graduate of Michigan State University and has completed courses through Gem Institute of America (GIA). He is owner of Korner Gem in Traverse City, Michigan. www.kornergem.com