Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

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 ...

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 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 months ...