5.25" x 3.25"
Interior and top third from Havre, lower from Mid-Atlantic Ridge rock slurry. Turquise thumbwell from tiles bought at at a souk (word for bazaar in Arabic).
NOTE" some out-of-roundness when you sight down on the rim -- porcelain, as it moves towards translucency sometimes does this. Intentional thick/thin brushstrokes on lower third, to show more character of material.