11.25" x 2.75"
Same materials on front and back look different because of application thickness. Center spiral is "All" glaze that pooled and melted in the grooves and slid off the hhigh places; it's the only sediment I use that is a mixture from many places: Mediterranean and Bering Seas, Atlantic, Pacific and Indian Oceans.
Brown is the Mid-Atlantic Ridge rock slurry. Crackled groove that frames the spiral is clear sea-glass that foramed up during firing and took on color from the All glaze next to it.Outside of that, the orange vapor-blush is from salt in the sediment.
Rim and foot are glazes assembled from refined materials.