French antique domed bombé ring 18k gold and black enamel set with a 0.45 carat old mine cut diamond (circa 1920) art deco donut

Magnificent French goldsmith work

Size: 51 FR / 5.5 US

Weight: 3.35 g

Diamond size: approximately 5 mm (estimated at 0.45 carats)

Diamond in good overall condition; except for a small scratch (probably a surface inclusion), a few small natural inclusions visible only under a magnifying glass

Head width: 9.1 mm

Micro-scratches from use

No hallmark

SKU : A05922