CHINESE ARCHAISTIC CARVED JADE / HARDSTONE BI DISC

CHINESE (20TH CENTURY, CARVED IN ARCHAIC STYLE) CARVED MOTTLED DARK GREY AND RUSSET HARDSTONE BI DISC WITH A CENTRAL CIRCULAR APERTURE ONE FACE INCISED WITH EIGHT RADIATING ARCHAIC BRONZE-SCRIPT CHARACTERS (JINWEN), THE REVERSE DEEPLY INCISED WITH FOUR STYLIZED ANTHROPOMORPHIC TAOTIE / DEITY MASKS SEPARATED BY LINEAR BORDERS 7 IN DIAMETER