Large stoneware bowl by Cathi Jefferson. It looks hand-made though it may be wheel-thrown and then altered. Anyway it is not symmetrical. Also it has a firing crack in the bottom (see photo 8) and there are some glaze imperfections.n Other than that it has no chips, cracks etc. Dimensions: Diameter 33.5 cm (13 inches); Height 22.0 cm (8.8 inches) The salt-fired technique used to finish pieces vaporizes at a high temperature in the kiln and interacts with the clay to create a glaze. The process can create a variety of textures on the same object.