In an Etsy shop, Ingram Cecil offers a really fun array of vintage and antique jewels. This Edwardian diamond ring might have been used as an engagement ring; it could certainly still be worn that way today, or just as a pretty diamond piece.
The description notes, “Gorgeous Edwardian era antique circa 1910 old European cut diamond moi et toi ring. Each diamond is .25 carats. There are 4 tiny rosecut diamonds in the leaves. In excellent condition. The diamonds are extremely sparkly, white and no inclusions. Stamped at 585 for 14K gold. Can be resized by a jeweler.”
This is priced at USD$1,000.