Simon Redfern receives funding from the British Council and the Natural Environment ... in the British Queen’s imperial state crown. The Star of Adam sapphire would originally have been created ...

Sri Lankan authorities on Sunday put on show what they said was the world’s largest natural corundum blue sapphire, weighing 310 kilograms (683 pounds), which was found in a gem pit about three ...

Sri Lankan authorities on Sunday put on show what they said was the world’s largest natural corundum blue sapphire, weighing 310 kilograms (683 pounds), which was found in a gem pit about three ...