What a brilliant sapphire! Mined in Kuruvita and cut & polished by my Ratnapura friend and gem artist Kumar. You have to see this sapphire in real life. Such luster, scintillation, sparkle, whatever you want to define it, absolutely fantastic, truly a must see! Looks like a blue diamond. It's super clean as well. And rightly priced. You can go ahead with this one. Unheated as Mother Nature created it millions of years ago. Rare & wonderful. Independently certified by GIL (Canada-Thailand) as unheated.