So I started on the pearl materials. I like the finish and the colors, but I think I need a bit more work on the amount and intensity of reflectivity. I'm using a fairly broad and bland HDR for lighting and turned off most of the ship's lights just to keep things as non-distracting as possible as I tweak the pearl colors.
Note: Everything other than the pearl hull material is just placeholder materials and colors. I'm sure I will tweak this many times before I finish, but I think I've reached a set of pearl materials that I like. Oh yeah, and I'm doing this in C4D and Octane.