The fun of buying a geode in a rock shop is that you never know what’s inside until they crack or slice it open for you. It might be solid and boring, or it might have a beautiful crystal cave inside. Look for one that seems light for its size: an interesting hollow rock naturally weighs less than a solid one.
Location: Studio
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!