AN 18TH CENTURY ROSE-CUT DIAMOND AND EMERALD DEMI-PARURE comprising a stomacher brooch and two bracelets, the brooch with diamond cluster centre in openwork foliate surround with emerald and diamond flowerheads at intervals, suspending a shaped oval drop en suite, the bracelets with openwork flower and foliage links, closed back silver settings, circa 1760, probably Spanish, in fitted case