It's lots of fun to make these offset layered rings. They always remind me of the topo maps that we use to seek out the mountains and canyons that we aren't familiar with yet...waiting to know. This stone I've had for awhile. It jumped out at me the last time I perused my collection, and it just needed to be this. Here it is.
The backplate measures 34 mm by 23 mm.
The shank is a 6 mm tall comfy domed band.
Climb that hill.