Eric Walker added Petoskey stone - Wikipedia to Petoskey stone
Eric Walker added Petoskey stone - Wikipedia and r/geology - Polishing a bomb Petoskey Stone from Michigan!! Gonna take time to perfect it. to Petoskey stone, and added Petoskey stone to Minerals and gems
Eric Walker added a number of topics and a number of links to Minerals and gems, and added Minerals and gems to Geology, Natural resources and Atoms, molecules, chemicals, minerals, materials and compounds