I've taken pictures of these before but never spent much time on them. The picture always turned out either blurry or the wrong tone from wrong white balance. I spent a little time today taking pictures of these and was pretty happy with the contrasting textures and colors in them. My son gave me these after a field trip a few years ago. They now sit in a dish with a dolphin coming out of it that was given to me by a good friend.
The settings were 1/4 sec, F3.5, ISO 400, WB Flash, Focal length 60mm.