Carved jade dagger, Western Zhou Dynasty

Ritual carving utensil with geometric and spiral shapes in bas-relief. The shape is elongated with a rounded, irregular handle with a hole for inserting a cord. The jade has a green hue with brown spots due to patina from age.

Attached is a "Certificate of Jade Identification".

Provenance: Important collection of Tommy Lam, Hong Kong, since 1980. 

Size: 14.9 x 1.2 x 3.8 cm; Weight: 98 g