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What scale are they at? Are we just looking at the bevel? If so there seems to be something going on at the very edge, like a secondary microbevel. Or it could be an artifact from in-camera...

When I experimented honing steel washers, I found:
Some hones leave a matte finish;
Some leave a shiny but non-mirror finish;
Some leave a shiny, mirror finish.

The odd thing is, there was no...