Tuff, 39x40 cm
The stones of the quern move and abrade each other until the abdomen disappears and the two sides are joined into a single disc. Under the sculpture there is a circular recess the lower plane of which is slanted and therefore the dust generated by the abrasion is collected there. By the time the two stones are fully interconnected, the ring closes.
Sandstone, tuff, 39x40 cm
The upper smaller sandstone is absorbed during the movement in the soft tuff underneath it. The dust generated here will gather inside the pedestal.