Has anyone ever compiled images of scratch patterns from popular hones so one could look at them and compare one to another? I know synthetics have grit/micron ratings but I think it would be neat if someone took a polished piece of metal and did X amount of strokes on each stone and published the results. Does something like this exist? I did that with some unknown stones I had laying around and under magnification I could see if one was finer than the other. I know natural stones really wouldn't fit in here due to variability but I'd take that data too. Look at me talking like this actually exists and that someone will turn up any minute with a URL :-)

If that doesn't exist, then surely a massive chart with all the popular stones rated in microns must exist?