Clessidra10 cm, H 25 cm (315 16 927 32 ) Little grains of sand, impalpable and unnoticeable as a whole yet so real, like time ticking away. In 1957, Fulvio Bianconi and Paolo Venini captured time and shaped it into Clessidra. Perfectly balanced between two different colors, sand flows through sleek glass, crafted using the Incalmo technique; as it flows, it gradually colors, becoming an integral part of the glass.