This jade disc has a circular hole in the center, and is carved in a way that the jade appears to be turning around this central point, almost in the shape of a hurricane symbol if it were to have three prongs. On each of the three prongs are three evenly spaced raised bumps.
This is a variety of bi disc, a circular object usually carved from jade made in periods ranging from Neolithic to Han China. Bi represent the heavens, which their rectangular counterpart, the cong, represents the earth. Their function is unknown, but is suspected to have been ritual or astronomical in nature.
jade cylinder with square shaped exterior and round interior, shallow relief carver on each side, possible representing zoomorphic designs that have been worn off. Dark jade material with many striations and mottles. Come in custom-designed silk box enclosed in a fine hardwood box. The inscription on wooden box indicates that the object was once part of the Duan Fang collection in late 19th century. Duan Fang was a Manchu stateman and reknowned antiquarian. His inscription date the object to the Zhou period. Recent archaeological work suggests that the object was probably made in the late 3rd millennium B.C.E. and remained in circulation by Shang period of the late 2nd millennium B.C.E.
ritual object, once probably zoomorphic line carvings on the surface of mystical animals, usually such objects were discovered in elite tombs of the late prehistoric to early Bronze Age China (3rd to 2nd millennium BCE)