Just a shell, but I kinda like the way it came out. I've been having a little difficulty with the colors I'm using in that the particular manufacturer's Burnt Sienna is slightly different from the Utrecht Burnt Sienna I commonly use. This means that it's difficult or impossible to achieve a truly neutral dark tone, hence my slightly bluish background colors. A stopped clock is right twice a day, however, and this particular shell has a color scheme eminently suited to the Burnt Sienna I'm using, in particular for the dusty purple spirals on the shell, a mixture of Sienna, Ultramarine and white. Mostly done with brushes, but with a few scrubby bits with knife thrown in at the end to try to capture the scratched, chalky suface of this old shell.