A LARGE MOTTLED GREY AND IVORY-COLORED JADE OR HARDSTONE BI DISC

A LARGE MOTTLED GREY AND IVORY-COLORED JADE OR HARDSTONE BI DISC
NEOLITHIC PERIOD, LIANGZHU CULTURE, 4TH-3RD MILLENNIUM BC
The thick disc has a central aperture drilled from both sides and the grey stone is suffused with a dense network of ivory and buff-colored alteration and has a satiny polish.
11 ½ in. (29 cm.) diam., cloth box