Roselane Antiques has dated this piece to the 1920s.
The central diamond is held in place by eight prongs in a solid Platinum case the outer halo of diamonds has an outer scalloped edge with inner edge in milgrain pattern.
Beautiful antique ring.
Central Diamond 1.25 cts approx
Halo Diamonds 0.30 approx
Total Diamonds 1.55 cts approx
Roselane Antiques has dated this piece to the 1920s.
You can view the stock and full dealer information on the Roselane Antiques Profile Page