The installation consists of five stone boulders, simply laid on the ground. What might appear to be a natural element inserted into the ‘artificial’ space of a museum is actually the result of a complex creative process. The sculptor initially modelled an ‘ideal’ stone in clay, smoothing it until it looked like a perfect stone, as if it had been shaped by the water of a stream. From this original form, five specimens were created in plaster, then in concrete, and finally, thanks to 3D scanning, they were sculpted in Matraia stone, a blue-grey material of exceptional compactness and strength. Although they have the same shape, the five boulders appear different as they are placed in five different positions, the only ones in which they are balanced.