I've made 4 of those brooches so far, and painted each one just slightly different but this one I am most satisfied with. You might not be able to tell from the photo, but there is some brown in it, to make it seem more like vintage pewter.
I really like the dog and crown on it:
The other painted piece in the top photo I think I'll make into a pin as it is just a little bit too large for a ring. The other two tinier pieces are just smaller versions of it, and I think I will make those into rings as well as pins.
I tried to make a tentacle sucker ring out of sculpey before, and it snapped fairly easily so I think I'll opt for some ring bases this time.