An emerald and diamond pendant necklace, early 20th century, of drop-shaped outline, suspending a

An emerald and diamond pendant necklace, early 20th century, of drop-shaped outline, suspending a pear-shaped cabochon emerald measuring approximately 14.1 x 9.0 x 5.2mm, within a border of pavé-set circular-cut and cushion-shaped diamonds, suspended from two diamond-set links, to a fine chain necklace, pendant length 2.8cm, necklace length 49cm, French ET import mark and import assay mark for platinum