I just received the Dia-Sharp 8000 mesh diamond whetstone. I cannot feel any grit whatsoever on this stone. I have a Norton 8000 and a Shapton 16000, which I realize are not diamond stones, but can feel the metal being removed on a blade. I don't know if the stone I have is defective? I looked at both sides under 100 magnification and see no signs of diamonds on either side, just scratched up nickel.