Corteccia, or bark glass, was impressed with a pattern resembling the rough surface of tree bark. The  abstract pattern on glass served several purposes. Not only was the glass attractive but also the gnarled surface with its divets and raised lines had an effect on the refraction of light. It turned out to be an excellent light diffuser and also happened to hide direct view of the light bulbs. Corteccia was usually found on tubular or ribbon-shaped glass like on this fixture. Just one of the impressive designs (along with the Tronchi and the Espirit) that Toni Zuccheri designed for Venini.
 
Dimensions:
 
Diameter: 18 inches
Height: 15.5 inches
 
 
 
Condition: 
Very good condition. Some wear to frame consistent with time.