An unusual sphene and diamond ring, centring a claw-set octagonal-shaped greenish-yellow sphene weighing 21.33 carats framed by a line of pave-set brilliant-cut diamonds to similarly set split shoulders, the diamonds together weighing approximately 0.95 carat, mounted in 18ct gold, size M1/2., accompanied by a GIA report numbered 2213652198, dated 3 May 2021, stating that the 21.33 carat sphene is natural, Greenish yellow colour.