Clay River Rocks and Pebbles

I really got excited about these hollow clay forms that were inspired from the naturally smooth river rocks we have here in Arizona. I made them from a white clay body and then applied various colored clay slips to the surface. When the colored slips were almost dry I stone polished each one and when the forms were bone dry I bisqued fired them. Concerned I might lose the color if I fired them again to the clay's maturity I choose to wax and polish again.