A diamond pendant necklace, late 19th century

The pear-shaped diamond, in a pinched collet-setting, to a scrolling surmount set with cushion-shaped and rose-cut diamond accents, to a later barley-link chain, principal diamond approx. 2.40 carats, cushion-shaped diamonds approx. 0.30 carat total, lengths: pendant 2.5cm, chain 43.7cm