I did something AWESOME. A horn :3
The new horn.

A. Horn is more claw-hoof like in texture with growth marks being fairly visible. Color has variations like hooves or claws.
B. Morse spots are still visible on the horns. They are bright, shiny, areas of calcium. Think of a pearl. It is possible for small pieces of these to chip off as the horn grows, but the calcium is always replaced.
C. Soft, squishy pad is similar to the bulb and frog of a horses hooves. The apex of the frog runs completely down the center underside of the horn as well as the surrounding sole. The nautiloid is now found inside the horn itself, being a nerve bundle that quite simply resembles the nautilus as tendril nerves spread from the spiral head to the end of the frog.
Slight design changes made to the knuckles. That will be worked out later.