High-quality sapphire and brilliant-cut diamond goldsmith's ring

Ca. Ø17.5mm, RG54, ca. 12.4g, 18K yellow gold, tapered design, thickness varies from top to bottom, approx. 11mm wide at the front, featuring a fine, natural and untreated sapphire at the centre, stone weight of 3.67ct hallmarked on the shank, origin Sri Lanka, transparent oval star/step cut, no evidence of heat treatment, furthermore, the ring shoulders are set with a total of 40 brilliant-cut diamonds, the total weight of which is 0.68 ct, also hallmarked; the sapphire comes with a DSEF report dated 2019.

Estimation:-

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