Marc Jacobs long necklace w/enamel +crystal charms

Gunmetal silver color chain. Enamel Marc Jacobs circular charms in mauve type color, also in faceted crystal. Then bone piece was added on my my mom. Can purchase the Marc Jacobs necklace with or without it. The top of the bone is surrounded in small sparkly black and clear crystals. A few of the small black crystals are missing as shown in one of the photos. I didn’t even realize they were missing until I inspected it closely to list it!!