寶石藍料盌　　雙方框《乾隆年製》楷書刻款

A bowl of this size and rich colour, with a Qianlong mark, but carved with six evenly spaced triangular indentations at the rim is in the Palace Museum Beijing, and is illustrated by Zhang Rong (ed.), Luster of Autumn Water, Glass of the Qing Imperial Workshop, Forbidden City Publishing House, 2005, no. 36.

Compare also with a glass bowl of this shape and size in the Victoria and Albert Museum, London, reference no. 122A-1883.