Gemological Institute of Ratnapura director Chamila Suranga inspects the 310kg corundum. Image: Reuters – Dinuka Liyanawatte

On display is the world's largest natural blue sapphire, weighing 310 kilograms. It was found at a private residential gem-pit in Horana, Sri Lanka. Image: Reuters - Dinuka Liyanawatte

People inspect the single natural blue sapphire named "Queen of Asia," considered the largest found in the world. Image: AFP