AgAu Jewellery has dated this piece to the 1950s.

Metal: 9ct yellow gold.
Hallmarks: Marked 9ct
Stone(s): 3 x black opal, approx (0.33ct), totalling (1.00ct)
Measurements: Pendant 16mm length x 9mm width Chain: 18'/45cm chain.
Weight 2.0g
Condition: Excellent 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