It was listed by AgAu Jewellery. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
AgAu Jewellery has dated this 9ct Gold Opal Pendant to the 1950s.

Metal: 9ct Yellow Gold.
Stones: 1 x opal (10.50ct))
Size: Pendant 3.0cm long, 1.5cm wide. Chain 18"/45cm
Hallmarks: Marked for 9ct gold
Weight: 4.6g
Condition: This item is presented in excellent condition.
AgAu Jewellery has dated this 9ct Gold Opal Pendant to the 1950s.
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You can view the stock and full dealer information on the AgAu Jewellery Profile Page