That is a great frame Grim! I always enjoy seeing it.I've found a lot of Drilled Teeth but I've never found an Elk Ivory, though I have seen some found here. I did however find a Cannel Coal Effigy of one on a site dated 1425 to 1575. It's on the far right in this picture. The others are Canine Tooth Effigies.
Yours is a very fine example.