The world’s largest single natural specimen of corundum as a single crystal (Blue sapphire) has been found in Sri Lanka, officials said. According to the National Gem and Jewellery Authority, the ...

COLOMBO, Dec 12 (Reuters) - Sri Lankan authorities on Sunday put on show what they said was the world's largest natural corundum blue sapphire, weighing 310 kilograms, which was found in a gem pit ...

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 ...

Sri Lankan authorities on Sunday put on show what they said was the world's largest natural corundum blue sapphire, weighing 310 kilograms, which was found in a gem pit about three months ago. Local ...

IN 1904 Prof. A. Verneuil published an account of his successful experiments on the artificial reproduction of ruby. He pointed out at the time that his method of crystallising was of considerable ...

IN the Summary report of the Geological Survey of Canada for 1896 Mr. W. F. Ferrier directed attention to the occurrence of corundum crystals in the township of Carlow, Hastings County, Ontario, and ...

The specimen, which weighs 310Kg dimension (66.04cm , 60.96cm, 48.26cm) has been named as the “Queen of Asia” The world’s largest single natural specimen of corundum as a single crystal (Blue sapphire ...

The large gem was found three months ago but was unveiled to the public only on Sunday in Horana at the home of one of the partners of the gem pit. The natural corundum blue sapphire is said to be the ...

Photo taken on Dec. 15, 2021 shows the natural corundum crystal blue sapphire named "Queen of Asia" on display in Horana, Sri Lanka. Sri Lankan authorities on Monday said the country had unearthed the ...