Great for any project requiring an ammonite shell base! The project this was originally used in had the opening covered, and some AO shading is still visible on the bottom - apologies for the messy paint in those areas.

You can also see the model here: https://sketchfab.com/3d-models/spiky-ammonite-sculpture-5df94e1eec6a46e58c63ebc7e4baabc3