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.
It's a tough time for the job market. Amid wider economic uncertainty, some analysts have said that businesses are at a “no-hire, no fire” standstill. At the same time, some sizeable layoffs have continued to pile up — raising worker anxieties across sectors. Some companies have pointed to rising operational costs due to U.S.'s new tariffs, while others have redirected money to artificial intelligence investments. Workers in the public sector have also been hit hard. Federal jobs were cut by the thousands earlier this year. And many workers are now going without pay as the U.S. government shutdown has now dragged on for more than a month.
Nvidia smashes earnings with record-breaking revenue and soaring Blackwell demand as shares slip this morning, Barron’s senior writer Adam Levine unpacks it all
Jeff Wagoner, CEO of Outrigger Hospitality Group, discusses the company’s coral preservation initiatives and sustainable practices at their hotels and resorts.
Dena Jalbert, Head of M&A at Align Advisory, discusses the state of mergers and acquisitions in 2025 and beyond, highlighting key trends and opportunities.
Kim Perell, author and entrepreneur, shares actionable tips and tricks to help current and aspiring entrepreneurs kick off 2026 with confidence and momentum.
Computer chipmaker Nvidia is poised to release a quarterly earnings report that is expected to either deepen a recent downturn in the stock market or prompt an ebullient sigh of relief among investors increasingly worried the world’s most valuable company is perched upon an artificial intelligence bubble about to burst.
Emera CEO Scott Balfour discusses soaring energy demand, AI-driven grid challenges, clean-power investments, and how the company is building a resilient future.
JB Mackenzie discusses Robinhood’s new entertainment prediction markets, letting users engage with pop culture, award shows, and more through low-stakes bets.
