A PAIR OF GEM-SET AND DIAMOND 'PNEUS' EARCLIPS, BY MARINA B Each of pendent design, pavé-set with brilliant-cut diamonds and accented with a polished onyx and blue chalcedony cabochon, suspending an interchangeable blue chalcedony bead, with similarly-cut diamond cap and connector, mounted in 18K gold, signed Marina B, maker's mark 'MB', numbered, Italian assay marks, French assay marks, with maker's case and screwdriver, together with three interchangeable bead fittings including possibly rose quartz, chrysoprase and citrines, length 5cm