Ancient jade coronary unitSpecifications:Liangzhu culture style, pumpkin yellow, cooked pit, oil moisten, good gloss, with ooze color, like a cloud.Crown cutting ChengBao covering structure, centered on drilling.Wear thin adduction, on both sides at the bottom of the cut, form a thin tenon, tenon on there are two small round holes, when insert bolt is fixed.Jade coronary, is typical of liangzhu culture, jade ware, more for collection, the shape of the changing rule of the norm.The top straight or circular concave, tenon department between back and no boundaries.Late coronary bottom appear flat tenon and thinning smaller.