AgAu Jewellery has dated this piece to the 1950s.

Metal: Pendant is 18ct white gold. The chain is 18" 9ct white gold.
Stones: 1 Blue zircon (1.25ct), 1 x diamond (2 points)
Size: Pendant size 2.0cm long/ 0.6cm wide. Chain size 50cm/ 20"
Hallmarks: Both chain and pendant are marked 18ct.
Weight: 3.1g
Condition: This item is presented in very good condition
AgAu Jewellery has dated this piece to the 1950s.
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