Chamila Suranga, a gemmology researcher attached to Gemological Institute of Ratnapura inspects a 310 kilograms (683 pounds) heavy natural corundum blue sapphire at a residence where it is kept in Horana, about 41 kilometers (25 miles) south of Colombo, Sri Lanka, Sunday, Dec. 12, 2021. A gem company in Sri Lanka has unveiled the massive gemstone that is certified as a rare and one of the biggest corundums found in the country and plans to offer it to museums and gem collectors. (AP Photo/Eranga Jayawardena)
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 country.
Sri Lanka's National Gem and Jewelry Authority says it has done a series of gemological tests on five samples taken from the rock.
“To our knowledge this specimen is indeed a rare specimen and not recorded in the geological literature," read an authentication letter given by the authority to the owners who unveiled the stone on Sunday.
When the outer layer was removed for inspection, the interior showed a silky blue patchy appearance, the letter said, suggesting the stone is a blue sapphire.
Shanka Ruwanditha, a director of the company that currently owns the massive stone, the Gemological Institute of Ratnapura, told The Associated Press on Monday that the owners plan to obtain the services of a local or foreign gem valuer soon to determine the price of the rock.
Sri Lanka and especially its southwestern city of Ratnapura, or the Gem City in the local language, has been known for centuries for mining gems and precious stones.
Former Cisco Systems CEO John Chambers learned all about technology’s volatile highs and lows as a veteran of the internet’s early boom days during the late 1990s and the ensuing meltdown that followed the mania. And now he is seeing potential signs of the cycle repeating with another transformative technology in artificial intelligence. Chambers is trying take some of the lessons he learned while riding a wave that turned Cisco into the world's most valuable company in 2000 before a crash hammered its stock price and apply them as an investor in AI startups. He recently discussed AI's promise and perils during an interview with The Associated Press.
Grove Collaborative’s CEO shares how the company is reinventing everyday goods with sustainability at the core and working toward a plastic-free future.
Atlanta Mayor Andre Dickens shares plans for affordable housing, community-led growth, and why private and public grocery stores could be key to food equity.
Tesla reported a surprise increase in sales in the third quarter as the electric car maker likely benefited from a rush by consumers to take advantage of a $7,500 credit before it expired on Sept. 30. The company reported Thursday that sales in the three months through September rose 7% compared to the same period a year ago. The gain follows two quarters of steep declines as people turned off by CEO Elon Musk’s foray into right-wing politics avoided buying his company’s cars and even protested at some dealerships. Sales rose to 497,099 vehicles, compared with 462,890 in the same period last year.