Neolithic Period to Han DynastyConsisting of a group of seven small jade bi discs, the largest 2.1cm (3/4in) diam.; a group of nineteen small jade rings, the largest 1.8cm (5/8in) diam.; a group of nine jade tubular beads, the largest 3.5cm (1 1/2in) long; and two strings of sixteen small jade ornaments including beads, rings, rod and a cong-shaped ornament, the largest 6cm (2 1/2in) long; all in various sizes and colour of stone ranging from chalky-white, greenish white, pale green, olive green, brown to grey tones. (51).