293 - A reddish-brown jade cong with distinct whitish veins, featuring a quadrangular outer section and a hollow cylindrical interior. It is structured in two superimposed registers featuring meticulous decoration of a simplified mythical mask, with eyes formed by concentric rings and decorative incisions covering the surface. Liangzhu Culture (c. 3300–2300 B.C.) or later.

A reddish-brown jade cong with distinct whitish veins, featuring a quadrangular outer section and a hollow cylindrical interior. It is structured in two superimposed registers featuring meticulous decoration of a simplified mythical mask, with eyes formed by concentric rings and decorative incisions covering the surface. Liangzhu Culture (c. 3300–2300 B.C.) or later. Dimensions: 6.0 x 8.1 x 8.0 cm Weight: 449 g