Watercolor on rolled polymer clay, about 2" x 2.5"
I was mainly focused on trying to learn the technique and get used to the materials and scale of things. With that in mind, I simply copied from an original in one of my library books: English Portrait Miniatures. Sadly, I had to return the book before finishing my miniature OR having the presence of mind to write down pertinent info concerning the artist and subject.
There are definitely things I want to do differently for the next attempt, most of which relate to tools and materials. For this first try, I simply used whatever I had on hand, but the student-grade watercolors made my job a lot more difficult. The white especially... it seemed to 'puddle' on the surface far more than any other color and didn't blend half as well either. Even if I don't buy any other new paint, I will certainly be investing in a good quality white before my next miniature.
Also on the top of my list are better brushes. A lot of very small brushes don't have the good flow required for the paint to cling to such a nonabsorbent surface. I noticed that the same tiny brush which left a good line on paper barely deposited any paint onto polymer clay. I'm hoping that real squirrel hair brushes (which were used in the 18th cen for such a purpose) will improve things.
My final, and perhaps largest, concern is how to protect the surface. Even when completely dry, one drop of water would lift the paint right up and and utterly ruin the miniature. The clay slab is a bit too thick to put under glass with a frame (although that will probably be a possibility for the fake ivory I intend to try at some point soon), so I am trying to find a good spray varnish, intended for watercolor, which will seal the surface. After all, it would be really pointless to have a miniature that you couldn't even risk taking outside!