Marbling, by layering or folding together and then cutting two colors of clay, became popular in the Tang dynasty. These wares are usually covered with a pale yellow or amber glaze, as in the present lot.
A similar dish of the same size is illustrated in Mayuyama, Seventy Years, Tokyo, 1976, p. 108, no. 307.
The result of Oxford thermoluminescence test no. 366r95 is consistent with the dating of this lot.