Links HMGC's Favorite Links American Federation of Mineralogical Societies Black Opal Direct Geology.com https://www.gia.edu/ Johnson Brothers Lapidary Kent's Tools Methods to Stabilize Material for Cutting Old Pueblo Lapidary Club Rio Grande Rock & Gem Magazine Rocky Mountain Federation of Mineralogical Societies SlickVacSeal Smithsonian Minerals and Gems Tucson Gem & Mineral Society Tucson Gem Show 101 TurnTex, LLC YOUTUBE CHANNELS DISCLAIMER: Inclusion in this list is not an endorsement by HMGC. All links are provided as a reference only and you are responsible for determining to utilize the products, services, or information offered by each website.