AgAu Jewellery has dated this piece to the 1960s.

Metal: 9ct yellow gold.
Stone(s): 1 x Russian Diopside (3.00ct), 40 x diamonds, totalling (0.40ct)
Ring Measurements: Ring size. 13mm x 12mm
Hallmark: For 9ct gold,
Size: UK size M
Weight: 2.6g
Condition: The condition is excellent.
AgAu Jewellery has dated this piece to the 1960s.
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