Thank you for contacting Mearto with your appraisal inquiry.

It is a beautiful diamond ring. Such vintage diamond rings are being offered at auction on a regular basis.
The design of the ring is very elegant and unique with the twisted band. The large diamond has a good size and the pave diamonds on the sides with the twisted design makes the ring quite extraordinary. I believe that this ring would attract the attention of both collectors and dealers if it came up for auction due to the diamonds, the design and the materials used in the ring.
The estimate provided is for a well-advertised specialised jewellery auction, where I believe the diamond ring has the best chance of realising its fullest potential. However, there is no measurement for the sentimental value you might attach to the lovely ring.
This appraisal for an auction house is not as high as an insurance price or as a listing price. 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