AgAu Jewellery has dated this piece to the 1920s.

Metal: 9ct yellow gold.
Stone(s): 3 x garnets, totalling (2.00ct) 2 x opal, totalling (1.00ct),
Measurements: Ring face 20mm x 8mm
Hallmark: Marked for 9ct, C.1923
Size. UK Size N
Weight: 3.7g
Condition: Excellent condition
AgAu Jewellery has dated this piece to the 1920s.
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