A micro mosaic brooch mounted, pompom, 19th century

A brooch micro mosaic on a blue glass vitrified support representing a man dressed like a Roman, wearing a crown of laurel and brandishing a torch flame, upright on his chariot drawn by two sea serpents, allegorical marine animal of the Roman antiquity.The mount in pomponne is made up of two serpents head to head carrying on their head a cabochon in green jasper.
Dimension of the micromosaic without the frame: H:2,4 cm L:2,7 cm