Q: What are sharpening stones?A: Better known as whetstones, oil stones, and ceramic stones, these work on your knife edge. We insist on quality and only stock the best sharpening stones for your kitchen knife and cutting edge. A knife sharpening stone works much like sandpaper, a 1000 grit stone would be much more course grit than a 6000 grit which would be more fine grit for polishing.Â