A coloured diamond and diamond ring, of cluster design, centring on four baguette diamonds of pale

A coloured diamond and diamond ring, of cluster design, centring on four baguette diamonds of pale yellow tint, within concentric borders of brilliant-cut diamonds of pale pink and colourless tints, the shoulders collet-set with pear-shaped diamonds of pale yellowish brown tint, mounted in three-coloured gold, size O1/2, stamped 750, maker's mark