“I have never before written a testimonial or endorsement for a product, but I am very happy to do so for The IGS Diamond Buyer’s Handguide and the extremely helpful email service! After reading the book I felt like I really had a good understanding of diamonds and the diamond business. With Martin’s prompt email appraisals, I always knew if I was being offered a reasonable price.
I felt many retail sales people did not understand basic concepts that I had learned from the guide. I also noticed that I was taken much more seriously be gemologist brokers when they realized I knew what I was talking about.”