In Art Deco style, I'm not quite sure the ring itself is Art Deco but it might be vintage or newer Art Deco style.
It has a beautiful GIA certed 2.15 S-T vs1 antique old European cut center. Beautiful light yellow color in a halo of French cut sapphires. The ring is a size 6 and faces 11.7mm. Made of platinum. Can be sized.