Gatsby Jewellery Ltd has dated this piece to the 1920s.
The stone is secured in an exceptional platinum mount, with diamond shaped detailing in the gallery leading to a slim and fluted shank.

Accompanied by a sapphire report from Gemmological Certification Services (GCS) stating the sapphire shows no indication of heating.
Cut:? Cushion cut.
Colour:? Blue in daylight, purple in incandescent light.

Clarity:? Eye clean.
Carat:? 4.87.
Circa:? 1925.
Size:? N (UK) or 6.5 (US). Free sizing available.
Measurements:? The sapphire is 8.94 x 8.82mm and sits 8.1mm from the finger.
Weight:? 4.46 grams.
Metal:? Platinum. 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