Four small jade carvings

Four small jade carvings
All carved from thinly sectioned white jade slivers displaying a slight greenish tinge: the first an ovoid bi-disc reversed by a fancifully archaistic taotie mask; the second a branch of two long tall flower blossoms; the third a horse primly seated beneath a bat and a lingzhi branch; the fourth a rectangular plaque displaying a rampant horse to verso and a chilong to recto.
2in (5cm) length of second and longest (4).