Watch: World’s largest corundum sapphire weighing over 300 kg unveiled in Sri Lanka
The gem was mined three months ago in Ratnapura.
Sri Lankan authorities put on show what they said was the world's largest natural corundum blue sapphire. Weighing more than 680 pounds, it was found in a gem pit about three months ago https://t.co/DDja7KiVYg pic.twitter.com/GxC3Vo6p3a
— Reuters (@Reuters) December 12, 2021