良渚文化(4000-4500年) 黄绿玉雕刻七叠人面玉琮 青黄色玉质，白色钙化斑布满于身。琮身略长，外壁方形，内壁作圆形，光素无纹。外壁上以线琢饰兽面纹，纹饰细腻，细若毫发，为良渚文化显著特点。 Neolithic, Liangzhu Culture Yellow-Olive Green Jade Cylinder, Zong The zong is of square cross section surrounding a central circular tube with rounded square collars, and tapers slightly from top to bottom. The sides are divided into seven register with a taotie mask at each of the four corners, on alternating register there are two narrow striated bands above a smaller ‘nose’, others are carved with only the ‘nose’. The mottled stone is of olive-green and yellow color.