Below is a chart that I extrapolated from a much more extensive one found here at Faceters.com. The chart was originally generated for folks that cut and facet their own gemstones. The knowledge about the abrasives certainly is appropriate here as well.
|American Standard (Grit)||Micron|
My analysis is that the next step in the process after the 1000 grit diamond stones is the 14 micron diamond paste leather or balsa strops. This mirrors my instinct that came about after sharpening hundreds of knives. Somewhere along the way I noticed that the ceramic stones were not a useful step so I stopped using mine.