The material below is fossilized walrus ivory, buried in Alaska for hundreds or thousands of years. It is not truly fossilized in the sense that the ivory has been replaced with minerals. It’s in the early stage of fossilization and is just slightly harder than fresh ivory. This particular material came from a friend, whose mother purchased it from a member of the Inuit tribe more than 20 years ago.
Fossilized ivory—whether walrus, wooly mammoth, or mastodon—may be collected on private lands with the permission of the land owner, and is not regulated under the Marine Mammals Protection Act.
Gluing the odd shapes and angles can be a challenge. As with kerfing (described below), fingers and a bit of patience work as well as anything. A spindle sander is a wonderful tool for shaping the points, assuming you can get past the smell, reminiscent of the dentist grinding your teeth.