An 18ct white gold, coloured diamond and gem-set 'Allegra' ring, by De Grisogono

An 18ct white gold, coloured diamond and gem-set \'Allegra\' ring, by De Grisogono

Composed of multiple overlapping bands of black diamonds, and gems including rubies and aquamarines, European Convention mark, finger size V, black diamonds not tested for natural colour origin

Signed de Grisogono, no. B40181