Here's the sea glass photo I promised. The first attempt had a broader spectrum:
but I just couldn't get the camera to focus properly. I thought the dark greens might be throwing things off, so I took out the darkest pieces for the top photo, and it still doesn't look crisp. I'm beginning to suspect that the camera can't see the pale colors well enough to focus on them at this distance. I may have to try a smaller composition and get in close.