18K MID-CENTURY MAUBOUSSIN DOME RING: A mid-century style French 18k gold dome ring with enameled blue, green, and white diamond lozenge pattern. The interior is signed ''Mauboussin Paris 18K''. The exterior is hallmarked with French eagle's head gold mark & Ste LFV trademark. Size 6.5. Total weight is 6.6g. Est. $2000/3000**