Ru ware stoneware dish, translucent grey-green glaze (celadon). 1086-1125, Northern Song Dynasty, Qingliangsi, Henan, China. 149mm wide, 37mm high. Percival David Foundation. © The Trustees of the British Museum

Ru ware stoneware dish, translucent grey-green glaze (celadon). 1086-1125, Northern Song Dynasty, Qingliangsi, Henan, China. 149mm wide, 37mm high. Percival David Foundation. © The Trustees of the British Museum