That shell, it's luminosity...so very pretty! The only thing I might have tried a little differently would be the crop...the area to the left is somewhat odd, I think because of the black surface showing? Regardless. I love this little shell and those little bits of sand clinging to it's side...just lovely. : )
Good concept, ok execution. It's a really nice shell, but it would have been showcased much better if the flat surface was completely covered in sand. The basics of lighting/framing/focus are good.