IMG 3041 in Browse Member Galleries 1 Posted March 16, 2017 · Report reply 3 things. You can see barren white patches, and areas where the glazed is pooled: which indicates it is over-fired. The coarse texture of the clay indicates that the clay is under-fired: immature. The slight off set where the crack is also suggest that the clay was immature. The uneven texture where the glaze did shiver off also indicates a bond failure between the clay and glaze: which also means the flux level in the clay is way off.