A platinum,diamond and natural sapphire ring

Basaltic origin (Thailand) sapphire octagonal-cut weighing approx. 2,50 carats surrounded by brilliant, tapered and baguette-cut diamonds weighing approx. 1,80 carats, color G/H, clarity IF-VS, (no indication of thermal treatment), ring size 14. I.G.N. certificate no. 22647, peso 6,9 gr.