The Chelsea Bijouterie Ltd has dated this piece to the 1920s.
Set to the center with a fabulous old brilliant cut diamond.
The diamond is in a attractive platinum illusion setting.
The 3.6 mm diamond weighs about 0.20 carat but it looks much larger due to the setting.

The diamond is clear & bright and sparkles beautifully.Colour H/I. Clarity VSI
It has very attractive platinum illusion shoulders with millegrain edging .
The head is 5.2 mm wide & it stands 5.6 mm proud of the shank.

It is size L 1/4 (UK), 6 (US) it would easily re size.
The yellow gold shank is marked 18 ct & PLAT.
This antique ring dates to the art deco period.
It is in excellent condition. It weighs 2.3 grams
It comes in the presentation box illustrated.
This beautiful ring looks stunning when worn.
The Chelsea Bijouterie Ltd has dated this piece to the 1920s.
You can view the stock and full dealer information on the The Chelsea Bijouterie Ltd Profile Page