AgAu Jewellery has dated this piece to the 1930s.

Metal: 18ct yellow gold band..
Stone(s): 1 x blue aquamarine (0.50ct) 8 x diamonds (0.16ct)
Ring Measurements: Ring Face. 11mm x 11mm.
Hallmark: Hallmarked for 18ct Gold
Size: UK size N
Weight: 3.1g
Condition: Very good condition
AgAu Jewellery has dated this piece to the 1930s.
Agau jewellery offer an extensive range of 9ct and 18ct gold jewellery.
You can view the stock and full dealer information on the AgAu Jewellery Profile Page