circa 2500-2000 B.C.
with smoothly polished flat thin sides, polished down in antiquity over original fissures where the translucent green stone shades to tan brown.
Diameter 4 3⁄4 inches (12 cm)
Ex Collection of Professor Max Loehr (1903-1988)
Ex J.J. Lally & Co., 1993 catalogue no. 17
Compare the similar green jade ring discovered at the Taosi culture site at Lushanmao, illustrated in Yu hun guo hun: yuqi, yu wenhua, Xia dai Zhongguo wenming zhan (Soul of Jade, Soul of the Nation: Exhibition of Jade, Jade Culture, and the Xia Dynasty Civilization in China), Hangzhou, 2013, p. 120.
新石器時代 玉環 徑12厘米
來源 羅樾教授(1903-1988)舊藏
藍理捷1993特展圖錄第17號