The jade carved ornament Cong has square exterior enclosing a cylindrical center, exterior carved with lined and archaic patterns, the jade is of celadon color tone with patina and stone veins.|Liangzhu Culture period.||Height: 2 5/8 in (6.7 cm) Length: 3 7/8 in (9.8 cm) Width: 3 7/8 in (9.8 cm)|良渚文化 玉琮|良渚玉琮系軟玉雕琢而成，從外觀看呈外方內圓、上大下小形。方柱形玉琮四面中間立槽，槽兩邊基本等距，誤差極小，其細密的陰紋線刻技藝達到了後世幾乎望塵莫及的地步。