I'm sorry for the shoddy camera-work. It's not really my field of expertise. Anyway...something I really wanted to try. It is a first work on other and more difficult materials than paper. While the motive is really simple, it was quite some work to get used to uneven surfaces, cracks, smudges and several other things.
I used pigment ink on a ram's horn.
The horns I'm using are generally of poorer quality and would most likely be thrown away but especially those are the ones with character, with little stains and cracks to work around.