With white stoneware, three glazes dipped one on top of another create some new colors.
First dip in Matt bronze green, which on center right is it by itself. Then going clockwise, dip into Raspberry, which gives a nice speckled black over the green, and has just a small portion of pure red. Because then I dipped into Satin White, and the red turned green with the white over it. I expected the pretty green being more shiny where the white went over the green.
Isn't this fun? I want to try doing more of this. After all, life is full of surprises, especially for potters.