587
A Sapphire and Diamond Ring
One step-cut sapphire, 11.09 caratsSurrounded by brilliant-cut diamonds, totalling approximately 1.80 caratsPlatinum(11.09-carat Sapphire)
<em>GIA report, numbered 2327379042, dated 10 April 2019, no indications of heating.
Another gem report, Madagascar, no indication of thermal treatment. </em>