Based on the carving style and motif characteristics, the object is identified as Liangzhu Culture jade plaque. With oval shape eyes carved by incised lines different from trenches made by metal tube like other Liangzhu jades. The exaggerated eyes are supposed to be those of mysterious bird as seen as the typical motif of Liangzhu cultural jades. There are two pairs of two directional holes on both ends of vertical edges on the top edge of the plaque. Antiquity evidences include differential weathering and additive crystals.
本件之紋飾為玄鳥之頭部, 強調雙眼. 雙眼為橢圓形, 陰線雕法. 瞳孔部份並未採用管狀器, 線條接縫處密合度高.玉珮頂端縱向面左右兩端, 各有一對同方向喇叭孔. 本器差異風化及次生長晶體等古玉現象明顯.
- quality of jade: 7
- rareness: 8
- historical and cultural significance: 7
- workmanship: 8
- size: 3
- condition: 10