The Dune collection is based on a particular technique, applied by hand by the framer goldsmith, using a special tool: a kind of hollow-tipped bulino that the French called perloir or pearl beads. In fact, they are gold beads that the specialist lifts on the smooth surface of the metal, with patient and precise work, sometimes very precise, as in the band rings of the Dune collection, where the geometric design in manatees requires a perfectly ordered perlination