Grind Rocks
All of our grind rocks are of a premium quality and choice comes down to finding a rock that works with your grinding technique. Black rocks - Aluminum oxide grit.  Tight bonded grit. Medium to heavy stock removal. Ruby rock - Premium aluminum oxide grit. Porous bond. Medium stock removal. Blue rock - Premium ceramic rock. Porous bond. Medium to light stock removal. Only required light, infrequent reshaping. Best seller.