🚧 Website Update in Progress — We’re currently updating the entire Gems and Minerals Rock website to create a smoother, more polished experience. You may notice pages, colors, and features changing along the way. Thank you for your patience while we work behind the scenes!

Rockhound Learning Center

Learning Center › Mineral Identification Basics

Course Lesson

Hardness and Streak

Learn the purpose of scratch hardness and streak tests, when they help, and how to avoid damaging a valuable specimen.

You can read every lesson now. Sign in to save your progress.