An antique Ceylon sapphire and diamond cluster ring, the oval cut unheat treated blue sapphire of 6.38cts, surrounded by old European cut diamonds, mounted in 18ct white and yellow gold, ring size N. Condition: in very good condition with all gems secure in their settings. The native cut sapphire has silk throughout, no internal stress or any other indications of heat or any other treatment. The culet is a long way off center. It measures 12.84 mm x 9.74 mm x 6.38 mm.