Thank you for contacting Mearto with your appraisal inquiry.

It is a beautiful ring. Such vintage diamond rings are being offered at auction on a regular basis.
The most important part of a ring is ofcourse the diamonds, the size, clarity and colour. In this case the diamonds are fairly small, however the design of the ring and the many smaller diamonds makes it a beautiful ring with a ctw of 0,61 and it would certainly attract the attention of both collectors and dealers if it came up for auction.
The size of the ring is 8,75 and can be resized.
It is the type and style of ring that never goes out of fashion which is why it is difficult to tell the exact age it was made.

Unfortunately diamonds and jewellery are priced much higher when first sold and at retail price whereas auction secondhand prices are lower as you do not pay for the labour but only the materials and design.
The estimate provided is for a well-advertised specialised online jewellery auction, where I believe the ring has the best chance of realising its fullest potential. However, there is no measurement for the sentimental value you might attach to the beautiful diamond ring. Retail "asking prices" can be higher and vary.

Please let me know if you have any additional questions. I’m happy to help.
Thank you