DIVA magazine features a ring from the Penrose Collection
"Traditional patterns in the Middle East are guided by an invisible grid. The Mario Uboldi Jewellery Art PENROSE Collection visualizes such a grid and treats it like a normal pattern. Layering these grids creates interferences that form patterns of a different nature yet similar in complexity. The Polychrome Star variation highlights the powerful nature of the geometry and visualizes its radial formation in a mesmerizing way."