I had received a rock hardness tester kit and was not shore what to do with it. Through some research I was able to find that the testing was known as a mohs test, and this test classifies rock in a 1 to 10 scale. This is nominally used for minerals, but what I was cureus about is using this scale for matrix uncovering fossil prep. If this is possible I wish to use this identification poses for selecting a blasting media. Duos anyone know if this is possible?