Based on the carving style and motif, the object is identified as Liangzhu Culture jade septic. Similar object is seen for the awl shape jade of L. 34cm, W.1.5cm, unearthed in 1982 from Graveyard N0.9 Fuquan San District, Qingpu, Shanghai Municipality. A collection of Regulatory Commission of Shanghai Municipality. Antiquity evidences include differential weathering, dissolved pits and additive crystals.
良渚文化錐形器, 長33.5cm, 寬3.5cm本件良渚神面紋錐形器之長度較1982年上海市青浦縣福泉山九號墓出土, 現藏於上海市管理委員會之錐形器(34cm)稍短, 但本件最寬處為3.5cm較該件(最寬處1.5cm)寬出2cm. 此外, 本件之紋飾較該件精美.本器有差異風化, 蝕孔及曝露晶面等古玉跡象.