Two archaic-style jade carvings

Two archaic-style jade carvings
17th/18th century
The first a bi disk, of traditional flattened thinly-sectioned ring shape, carved to one side in a pattern of bosses between raised interior and exterior edges encircling the perimeters, the underside undecorated; the second a short cong section, the exterior square edge very slightly distended displaying edges and corners adorned in shallowly raised geometric patterns, the interior cylindrical mouth and foot rims protruding and smoothly polished; both pieces of predominantly dark brown color displaying patches of lighter hue and deterioration to the stone.
4 3/4in (12cm) diameter of bi disk
2 1/2in (6.4cm) width of cong