Attributed to Jean Ecosse 

A gold mounted agate two-handles cup and saucer, Paris, c. 1726-1732

Cup: 2 1/2 x 4 1/2 x 3 3/8 inches (6.3 x 11.4 x 8.6 cm) 
Saucer: 1 x 4 5/8 x 4 1/2 inches (2.5 x 11.8 x 11.4 cm)