A 19th century Italian gold micro mosaic pendant/brooch and necklace

A 19th century Italian gold micro mosaic pendant/brooch and necklace
The shaped cartouche design panel with central mosaic circular plaque depicting Eros holding a goat by the horns, with mosaic surmount depicting twin swans amongst foliage, and scalloped surround of floral motifs suspending matching pear-shaped triple drops, to a mosaic suspension loop and gold snake-link neckchain, the reverse with locket compartment, circa 1860, detachable brooch fitting, necklace approximately 160.0 cm. long