This open ring is set with a 4.5mm emerald-cut square blue sapphire approximately .50 ct., heat-treated only, and a .12 ct., FG VS 2.5mm princess-cut diamond, bezel set in palladium. The shank is also palladium and measures 2mm thick x 2.75mm wide.
Generally, size down about 1/4 size in an open shank ring. This ring is a 6.25 is marked with c.iskiw and Pd950.
This ring was priced much below current palladium costs.