漢代黃玉璧, Han Dynasty Jade Bi, D.19.5cm,T.0.8cm

S__3743810

160826012942-black-hole-breakthrough-lee-pkg-00002217-full-169本器黃玉雕, 雙面飾穀紋, 穀粒高聳, 刀法犀利有力, 玉璧外緣壁面刀法特殊, 狀似刀削, 古玉跡象為擴散暈沁色及鈣化.Carved with yellow tone Hetian jade, this bi is decorated crop sprouts on both sides. The edge of the bi has sharp angle with multi-level planes which is quite different from single level plane. This fact may reflect the advancement of harder tools and more skillful technique of the Han Dynasty. Still_2018-02-22_223243_60X_N0010 Antiquity evidences include diffusive marking and differential weathering.Some researches believe that the ritual jade bi relates to the celestial body  such as the black hole (image of lower left is one scene of the black hole published in internet.).

Appraisal Indexes:
1. quality of jade: 10
2. rareness: 9
3. historical and cultural significance: 9
4. workmanship: 9
5. size:10
6. condition: 10