limestone

  • 8 Surprising Household Uses for Chalk

    8 Surprising Household Uses for Chalk

    You probably don’t give chalk a whole lot of thought on regular basis — but maybe you should. Chalk isn’t just for old-school classrooms or for kids who want to (temporarily) beautify their driveways and footpaths: No, the porous sedimentary rock actually has a considerable amount of practical uses around the house. We’ve told you…