Great old Aquamarine and rose cut and mine cut Diamond ring. The band is not hallmarked, but tested 12K yellow gold. The top is all silver with many many prongs. The Aquamarine stone is a light sky blue/green. The stone measures 16mm X 10mm. There are 28 rose cut and mine cut Diamonds. Ring is size 7 1/2. Weight is 6.5grms. Condition is very good for age. I would date this ring at c1900.
Rose Cut Moonstone Ring, Moonstone and Diamond Ring, Moonstone Ring, Asymmetrical, Blue Flash, Rose Gold Ring, June Birthstone, Nixin by NIXIN on Etsy https://www.etsy.com/listing/161158899/rose-cut-moonstone-ring-moonstone-and
Platinum and diamond ring, bezel set with three round diamonds (2 European-cuts and 1 mine-cut). clarity I-1 and color J-K. Ring is also set with six small round diamonds (2 European-cuts and 4 single-cuts). All nine diamonds have a total weight of 2.30-carats. The setting is has a swirly scroll motif with milgrain tooling. Edwardian or Edwardian style.