Gems, Minerals and Rocks Please find some information articles that will be of interest to anyone wanting to learn more about Gems, Minerals and Rocks. Rocks ‘n Minerals – Do you know the difference?Mohs’ Scale of (Mineral) HardnessAmethystJasper We will be adding to this page with more articles – thank you for your patience SHARE THIS:FacebookEmailMoreTwitterPinterestTumblrRedditPrint