Antique Ruby, Emerald & Diamond Locket

Measuring approx.1 1/4 x 1 inch (including bail), set with a pear shaped ruby measuring approx. 4.5 x 3.5 mm, additionally set with six round rubies ranging in size from 1-1.5mm., additionally set with ten Rose cut diamonds measuring approx. 0.7-1mm & eight round faceted emeralds measuring approx. 0.9-1.1mm., suspended from 18 inch chain, fashioned in 18k yellow gold. Portuguese hallmarks.