Jade Circle of Six Huang
??This set is composed of six pieces of the same type of jade all with brownish-white coloration around the edges. The jade inside each piece is dark green with striations. This uniformity suggests that they were all cut from the same piece of jade. These pieces can be arranged to form a polygonal shape (close to that of a hexagon). Two sides of each piece were worked so that the pieces all fit together, and the adjoining sides are either straight or diagonal and were drilled with two holes from one side. The thickness of the pieces differ; some have a protruding side with the other one slightly slanting but even. The traces of a straight line show where the pieces were sliced.
??The pieces can actually be arranged in several ways, but the most suitable one is as follows; as a rule, the larger of the holes is at the top and a straight side fits against a diagonal side. Some holes appear to have been re-drilled because the original ones broke. As a result, some sides do not match up perfectly. For example, the broken corner of the slanting side of the first piece (as numbered in the link below) originally had a hole that broke (and can still be seen). Also, the third piece differs in shape and may have been reworked on both sides to fit into the arrangement.
??The design of jade circle arrangements is perhaps linked to the formation of stone circles found at ritual centers in the Ch'i-chia culture.