A very rare archaic jade ritual vessel, cong
Neolithic Period, Liangzhu Culture
Of short cylindrical square section, each projected corner finely and precisely depicted with two registers of stylised human and animal masks below two raised bands incised with parallel lines, the upper face with small circular eyes and the lower face with larger protruding eyes, both noses formed by a small raised bands with rounded ends, the lustrous opaque stone of chalky-white tone suffused with buff inclusions. 8.4cm (3 1/4in) wide