Rockhounding & Prospecting: Upper Midwest How to Find Gold, Copper, Agates, Thomsonite & Other Favorites Magnuson, Jim Heftet / 2021 / Engelsk
From Rough Stones to Wow Turn Your Rocks & Minerals into Beautiful Gems Magnuson, Jim Heftet / 2025 / Engelsk
Gemstone Tumbling, Cutting, Drilling & Cabochon Making A Simple Guide to Finishing Rough Stones Magnuson, Jim Innbundet / 2018 / Engelsk
