Art Deco style pink sapphire and diamond geometric cluster ring

Art Deco style pink sapphire and diamond geometric cluster ring in 18kt yellow gold. Centred with a square scissor cut fancy pink sapphire in a slightly raised millegrain setting, surrounded and by twelve round brilliant cut diamonds in grain and square collet settings, to an octagonal cluster design with millegrain frames open gallery supported by cheniers and raised trumpeting shoulders featuring ribbed terminals before smoothing to a solid shank. Marked 18kt gold.