Tianhuang Seal, Qian Song, first half 19th century, Brooklyn Museum: Asian Art
A seal of rich reddish amber color, carved in the form of a mountain cliff, with Su Dong-po and his friend in a boat sailing beneath a waterfall, one side with a colophon. Seal inscription carved by Chien Song (1807-1860). Signed Shu Kai. Artist from Hangchou, Chekiang province, and is a specialist in seal carving as well as a calligrapher and painter. His reputation for seal carving was second only to Ting Chin (1695-1765) and Huang I (1744-1802) the two greatest seal carvers of the Ch'ing Dynasty. The subject of the carving is Su Dong-po's visit to the Red Cliff and the carver of the landscape scene is Ching chuan (who may also be known as Yang I, who was a calligrapher and seal carver of the Ch'ing Dynasty. This information was given by Er-lu Wu, Assistant to R.H. Ellsworth. Condition: Excellent Size: 3 3/4 x 1 1/4 x 1 1/4 in. (9.5 x 3.2 x 3.2 cm) Medium: Tianhuang (heavenly yellow) stone
https://www.brooklynmuseum.org/opencollection/objects/4295