An Art Deco diamond, onyx and synthetic ruby bombé ring, c.1930

An Art Deco diamond, onyx and synthetic ruby bombé ring, c.1930,
with an old European cut diamond, rub set to the centre. A graduated row of old Swiss cut diamonds, milligrain set to each of the compass points, with a border of baguette cut onyx. Triangular sections with calibré cut synthetic rubies, milligrain set to open frames with a later half shank. Head 21 x 11.70mm, 4.41g.
Finger size L½
Estimated at £1,350 - £1,500

Condition report:
Head tested as approximately platinum. Later half shank tested as approximately 18ct gold.