Blade Jade Zhang western Zhou dynasty

China 1046-771BC
The long blade of rectangular form with a diagonal sharpened edge, pierced with an aperture to the handle flanked by serrated edges. The semi translucent stone is of a pale celadon color with areas of reddish brown and gray calcification.
Very good condition, commensurate with age. Ancient wear, minor signs of weathering and erosion, tiny nibbles, and small old chips.
The jade with natural fissures.
From a private collection New York. Number 7175
Expert authentification, Dr Gu Fang examined the present lot and guarantees its authenticity and the dating above, nothing the style of cutting, workmanship, and thickness and quality of stone with decomposed areas indicating burial all suggest a western Zhou date. He assessed it as a piece of notably good quality.A signed and notarized copy Dr Gu's expertise, dated 10/01/2010 in New York