Gatsby Jewellery Ltd has dated this piece to the 1920s.

Cut:? Oval sapphire and eight-cut diamonds.
Colour:? The sapphire displays a slight colour change: blue in daylight and purple in incandescent light. The diamonds are H to I.
Clarity:? The sapphire is slightly included. The diamond are VS1 to VS2.

Carat:? The sapphire is 6.12 carat. With a total approximate diamond weight of 0.30 carat.
Circa:? 1920.
Size:? P 1/2 (UK) or 7 3/4 (US). Free sizing available.
Measurements:? The sapphire is approximately 11.7 x 9.4mm. The head of the ring is 17.95 x 15.1mm and sits 6.2mm from the finger.
Weight:? 4.78 grams.
Metal:? Platinum. The claws holding the sapphire are 18k yellow gold. Tested with a Niton DXL Precious Metal Analyzer.
Gatsby Jewellery Ltd has dated this piece to the 1920s.
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