Meet the Gem Guys

Welcome to The Gem Guys Education Center!

Your instructor will be Bill Sustachek.  Bill is the owner and current Head Appraiser. Bill is a Graduate Gemologist, Certified Gemologist Appraiser, and Certified Insurance Appraiser. He will regularly post bits of information on all kinds of topics in the Gemology and Jewelry World. From manufacturing and mining, to myth and lore of gemstones, here’s where you’ll find it!

Click on any of the articles to the left to learn more. If there is a specific bit of information you’re looking for, or just have a question, please feel free to email us at