细节
A LARGE DARK GREEN JADE BI
Han dynasty, 2nd-1st century BC
Both sides with a plain inner and outer border, with a wide band of faceted comma spirals carved in low relief within an hexagonal criss-cross gridwork set between narrow striated borders, and an outer band carved with outward-facing bovine masks, their long scrolling horns crossed by another shorter scroll ending in a bird's head, the dark green stone with extensive opaque buff alteration
11in. (28cm.) diam., box