The stone has deep purple-brown colour and on the underside it has a relief of a tortoise carrying a tablet. On the base is inscribed the words "By Imperial Decree: Xuan He." The estimate is $850 000-$1.5 million, although it is more likely to reach the top end of the estimate.

The sale also features a collection of both ancient and contemporary ink scroll paintings, including works by blue-chip Chinese masters such as Zhang Daqian (1899-1983), creator of the double panel "Lotus" which is estimated at $100 000-$150 000.

"Plum Blossoms", is a 14th century Yuan Dynasty work by Wang Mian. It is a rare example of a court artist breaking from tradition as it is bolder and ahead of its time. The pieces is inscribed and signed with the artist seal and has one colophon by Ji Tong. The painting also features eight Emperors' seals as well as eight Collectors seals.

Search the sale here.