Of slightly irregular diamond shape, the top exterior of the fittedlid incised in shallow relief to depict an archaistic face bearingan unusually toothy and mischievous expression surrounded bygeometric patterns and a shou medallion, the remainder of theexterior surfaces undecorated, carved from stone of green gray colordisplaying flecks and veins of russet inclusions to the underside.3 1/2 x 2 1/4 x 1in (9 x 5.6 x 2.6cm)