Gatsby Jewellery Ltd has dated this piece to the 1960s.
The stone is mounted in a custom made yellow gold collet with and secured by eight split claws.

Included is the original 18k yellow gold trace chain.
Cut – Cushion cut.
Carat – Approximately 50.00 carat.
Circa – 1960.
Measurements – The sapphire is 24.6 x 17.75mm. The stone is 17mm deep.
Metal – 18k gold. Tested.
Gatsby Jewellery Ltd has dated this piece to the 1960s.
Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.
You can view the stock and full dealer information on the Gatsby Jewellery Ltd Profile Page