I have been looking for a hone for over 50 years. I have several I've acquired from eBay and other places that don't quite do what I'm looking for. In the 70s I had a hone that gave a wonderful edge. You could take a new folding knife and start honing with water and pressure that would create a good slurry and cut quickly then lighten up on the pressure and get a very smooth polished edge that was extremally Sharpe. The stone was a natural stone. I keep it in my tool box at work and some how it walked away. I didn't know the make of this stone but have been looking for another one since then. Would anyone know or suggest the type or name I should be looking for. I watch this forum a lot and know there are quite a few knowledgeable people here. Some one may be able to help me out. the stone was grayish green. Thanks.