Here are some microscopic pictures of an edge from a quality razor, a friend has send me after I asked him to (I'm not sure if he wants me to mention his name);
Attachment 231809
The above picture is the edge from a chocera,
Attachment 231810
This one if from a very fine coticule but the light or magnification appears a bit different,
Attachment 231811
The above is from the Vermio stone on water, and the below if from the stone with oil.
Attachment 231812
Some microchipping appears on all stones when the edge is not stropped (the above aren't), so, if you don't want to see it, strop your razor and then check the edge. This way, I think is a better indicator of real microchipping.