Plaque with Jousting Knights

Rectangular plaque with two jousting knights. The plaque is long and thin, horizontal. Two knights on horseback face each other. Both knights wear helmets and armor. The knight on the left wears a helmet with a visor and a tunic over armor. The knight on the right wears a helmet with a visor, a tunic over armor, and a shield. Both knights hold long lances. The horses' heads are visible; both horses have bridle and snaffle. The background is patterned with small diamonds. The edges of the plaque are rough and uneven. The color of the plaque is a light beige or off-white. The plaque appears to be made of carved bone or ivory.