Western Zhou Dynasty (1027 – 771 B.C.)
the sloping sides of the shell incised with lozenge pattern, the underside formed as the plastron and incised with scroll and chevron motifs, deeply grooved at the ends and drilled longitudinally, the translucent jade of even pale green tone.
Length 3⁄4 inch (2 cm)
A very similar jade tortoise shell form bead is illustrated in Gugong bowuyuan cangpin daxi: yuqi bian (Compendium of Collections in the Palace Museum: Jade), Vol. 2, Xia, Shang, Zhou, Beijing, 2011, p. 248, no. 302. Compare also the similar jade tortoise shell illustrated by Jenyns, Chinese Archaic Jades in the British Museum, London, 1951, pl. XXIIc.
西周 玉龜殼 長 2 厘米