Gatsby Jewellery Ltd has dated this piece to the 1950s.
The stone is secured in a four claw collet which is accented by two pairs of old mine cut diamond set either side. A further six diamonds (three each side) are set in the shoulders, leading to a slim 18k white gold shank.

Accompanied by a sapphire report from The Gem & Pearl Laboratory stating the sapphire shows no indications of heating, and is Sri Lankan (Ceylon) in origin.
Cut – Oval cut sapphire with old mine cut and eight-cut diamonds.

Colour – The diamonds are G to H.
Clarity – The sapphire is loupe clean. The diamonds are VS2 to SI1.
Carat – The sapphire is 7.13 carat with a total approximate diamond weight of 0.36 carat.
Circa – 1955.

Size – N (UK) or 6.5 (US). Complimentary sizing is available, can go up or down. Please note, the internal sizing adjuster can be removed if you prefer.
Measurements – The sapphire is 12.6 x 10.6mm. Sits 7.5mm from the finger.
Metal – 18k white gold. Tested.
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/857474273
Gatsby Jewellery Ltd has dated this piece to the 1950s.
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