Jim, You had me at bison. Darn, I do like those horns. Nice touch with the slightly flared baseplug. So subtle that it is hardly noticeable, but it does make a difference. I don't think bison horns need anything else but their own simple elegance to totally shine. Well played.
I am thinking the nose of the horn is faceted, but with the darkness of the horn and the lighting it is tough to see. If so, that's all the horn needed for decoration.
The groove that the facets end at looks a wee bit rough. It could be that it is or it could be how it was photographed. If it's rough, Jantz Supply, the knife building supply business offers small round files of various roughness. They make smoothing out grooves a simple matter. After it's smoothed, buff with 0000 steel wool, touch it to a buffing wheel and presto change-0. I also made a little handle with a short length of 1/4" dowel epoxied in, and wrapped 320 grit paper then 400 grit paper around it and cleaned up the grooves that way. All sorts of fun little tricks to try to get the job done. Not to mention a Dremmel tool with a 5/16 diameter stone. Scratches in grooves - always a nemesis to me.
Anyway, I really like the horn. Thanks for showing it.
John (Bigsmoke)