The world's biggest blue star sapphire, worth at least $100 million (£68 million), has been mined in Sri Lanka.
The gemology institute in the capital Colombo has certified that the gem weighs 1404.49 carats, according to the BBC.
The previous record was 1,395 carats.
"The moment I saw it, I decided to buy," the current owner, who asked to remain anonymous, told the BBC World Service's Newsday progamme,adding that it could sell for as much as $175 million at auction.
"When the stone was brought to me I suspected that it might be the world's largest blue star sapphire. So I took a risk and bought it."
Star sapphires have a milky quality caused by the mineral rutile. Its fibres reflect light into the distinctive star pattern.
The owner declined to say how much he paid for the stone, but explained he named it the Star of Adam following a Muslim belief that Adam arrived in Sri Lanka after being banished from the Garden of Eden. Local Muslims and Christians believe he first set foot on a mountain now known as Adam's Peak.
The stone was found in a mine near the city of Ratnapura, known as the City of Gems and at the centre of Sri Lanka's £70 million a year industry.
The country was the source of a sapphire for Princess Diana's engagement ring, now owned by the Duchess of Cambridge.