COLOMBO, Sri Lanka — A gem company in Sri Lanka has unveiled a rare and massive gemstone weighing 683 pounds (310 kilograms) that has been certified as one of the biggest corundums ever found in the ...
COLOMBO, Sri Lanka (AP) — A Sri Lankan gem merchant claiming to have the world’s biggest star blue sapphire is ready to sell the precious stone he says is worth at least $300 million. The Gemmological ...
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