The jade carved disc is of compressed form, the center hollow hole's edge raised, the jade is of celadon-yellow color tone with russet and veins.|Shang Dynasty period.||Diameter: 5 1/2 in (14.0 cm)|商 玉雕凸唇環|器體較薄，通體帶沁色。呈圓形，中間為一大孔，沿處起一圈環形凸唇。這種凸唇環在商代較為流行，器形大小不一，簡潔規矩，打磨精細，有的還陰刻細線裝飾紋。凸唇在佩戴時可起到穩固作用，同時又有一定的裝飾效果。