Unique carved shell choker style necklace

This is a very unique colored carved shell necklace. This is from my beach loving mother in law’s collection and I have no idea what kind of shell or anything on this piece. It appears to have some drill holes in a few of the sections where some other ornamental thing might have been attached. The necklace is very odd as each shell in life is different. See pictures for details and approximate measurements Age related wear Ask any questions🙋‍♀️ Bundle for extra savings🛍🚐 Happy Poshing❤️🐾🐾🚐 #white #beige #nature A343