Sorry these pictures aren't as good as they should have been but I'm showing the progression of a little spur of the moment project. I had these strips of Sahara Sand paper and had stamped the shell images on them intending to use them just that way on the birthday card for my DIL. Side-by-side. It didn't really pan out the way I intended so I went another route, but as I sat looking at those strips I decided to fill in the gaps between the shells with Karry Huen's tangle called Sand Swirl. I added the tangle with a sepia Micron pen. Then I took a white gel marker and added some white highlights to the shells. I added even more subtler highlights with a white pencil. Then I added the shadows to the tangles with a rose colored Prismacolor pencil. I think I will trim these up to be bookmarks.
Another spur of the moment tangle project was on this shell that I picked up on the beach last weekend. I had seen some beautiful examples of blue Sharpie on scallop shells on Pinterest and I would share the link but it links to a Facebook page and I'm not sure I can do that.
Here's a point of reference to see the size of the shell - about medium size. While this wasn't impossible, I think it would be much easier on the smooth surface of a scallop shell. The ridges on this one were a little tricky and caused me to elaborate on my pattern thicknesses.
I'll be posting my April calendar tangles soon.