CHINESE ARCHAISTIC CARVED JADE FOUR-PIECE BI DISC

CHINESE ARCHAIC-REVIVAL CARVED JADE / HARDSTONE "FOUR SYMBOLS" CIRCULAR PLAQUE SET (FOUR PIECES), 20TH C., HAN DYNASTY STYLE CARVED FROM A DENSE, BROWNISH-GREY JADE / HARDSTONE WITH EXTENSIVE CHALKY WHITE CALCIFICATION, AND NATURAL RUSSET DERMAL CLOUDING FOUR INTERLOCKING ARC-SHAPED FAN PLAQUES ASSEMBLING INTO A LARGE RITUAL RING (BI DISC) WITH A CENTRAL CIRCULAR APERTURE. EACH SEGMENT IS CARVED IN RELIEF WITH ONE OF THE FOUR MYTHOLOGICAL DIRECTIONAL BEASTS (SISEN / SIXIANG) ENCLOSED BY ROWS OF ARCHAIC SEAL SCRIPT (ZHUANSHU) INSCRIPTIONS, RECESSED LOTUS-PETAL REGISTERS, AND INCISED RUNNING SCROLL BORDERS MEASURES 14 IN DIAMETER