Attributed to Jacques Stella 
The martyrdom of Saint Catherine of Alexandria, Italy, c. 1630

Oil on lapis lazuli in gold enamel and rock crystal frame

2 3/8 x 2 3/4 x 1/4 inches (6 x 7 x 0.6 cm)

Framed: 4 x 4 1/2 inches (10.2 x 11.4 cm)