I was wondering if anyone had any octagonal shape stones mounted... I am curious to know what they look like set. I searched but yielded no results. The exact stone that I am looking at is one by Osirisgems.
Since the outline of an octagonal stone is so close to that of an Asscher I would suggest just searching for images of mounted asscher cut stones. They seem to be very popular around here and so there''s no shortage of those images. Any prong style setting which worked for an asscher would work for the stone you''re looking at.