This necklace was given to me by my grandfather about 40 years ago. I didn't know the details, so I looked into it and found out that it appears to be a necklace made of elephant bone. It's not certain, so please check the images and only purchase if you are satisfied. The length is approximately 45cm. The connections are loose, so you may need to replace them for actual use. The clasp is also a screw type made of the same material.