Rounded Rectangle Rune Stones

This is a set of clay rune stone with the runes carved into the clay.  I glazed them in two groups.  The black glaze dripped into the carved lines in the first firing and came out with a texture that looks like drops of water in the second firing.  Next time I want to try to decorate them with slip (liquid clay).

The rune stones are 1 inch by 2 inches and about a quarter inch thick.