Dear Jamey:
Happy New Year. Many pleasure seeing your reply this morning. About the spacing beads, it seems the choker’s maker used mammal bone as ingredient material (Ox bone, or pig bone, I cannot tell the difference). For the more, although those bone-like spacing beads look smooth on this side I shown in the photo, their other aspect overspread corroding vestige, I did not see the same phenomenon on those shell beads. Wish you and other scholars can solve the secret about these beads early. Thank you again and have a nice New Year holiday,

Yours
Wayne