Horn and bone drawing

This is a larger piece A3 size done with charcoal and Faber-Castell pencils.

The first stage was to put down lines and start blocking in shadows.
For reference I got pics of ram horns and various other types of horns.

For the next part I start puting down some detail on the horn.

I have blocked in most of the shadow now and have a good idea of how I want it to look.

The last parts are putting in the details and the background. I used various animal skull pics for reference and picked out the shapes and textures that I liked.