Largest Martian Meteorite on Earth sold for millions at auction
Named NWA 16788, the 54-pound (25-kilogram) rock was unearthed by a meteorite hunter in Niger 's Sahara Desert in November 2023.
According to Sotheby's, this extraordinary specimen was blown off the surface of Mars by a massive asteroid strike, subsequently travelling an astonishing 140 million miles (225 million kilometres) to Earth.
The identity of the buyer was not immediately disclosed. The final bid was $4.3 million.
The final official bid price, including various fees and costs, reached approximately $5.3 million, a significant increase on the estimated sale price before the auction of $2 million to $4 million.
Before the auction, two advance bids of $1.9 million and $2 million were submitted.
The live bidding went slower than for many other objects that were sold, with the auctioneer trying to coax more offers and decreasing the $200,000 to $300,000 bid intervals to $100,000 after the proposals hit $4 million.
The red, brown and gray meteorite is about 70 per cent larger than the next largest piece of Mars found on Earth and represents nearly 7 per cent of all the Martian material currently on this planet, Sotheby's says.
It measures nearly 15 inches by 11 inches by 6 inches (375 millimeters by 279 millimeters by 152 millimeters).
It was also a rare find. There are only 400 Martian meteorites out of the more than 77,000 officially recognised meteorites found on Earth, the auction house says.
'This Martian meteorite is the largest piece of Mars we have ever found by a long shot,' Cassandra Hatton, vice chairman for science and natural history at Sotheby's, said in an interview before the auction.
'So it's more than double the size of what we previously thought was the largest piece of Mars.'
It's not clear exactly when the meteorite was blasted off the surface of Mars, but testing showed it probably happened in recent years, Sotheby's says.
Hatton said a specialised lab examined a small piece of the red planet remnant and confirmed it was from Mars. It was compared with the distinct chemical composition of Martian meteorites discovered during the Viking space probe that landed on Mars in 1976, she said.
The examination found that it is an 'olivine-microgabbroic shergottite,' a type of Martian rock formed from the slow cooling of Martian magma. It has a course-grained texture and contains the minerals pyroxene and olivine, Sotheby's says.
It also has a glassy surface, likely due to the high heat that burned it when it fell through Earth's atmosphere, Hatton said. 'So that was their first clue that this wasn't just some big rock on the ground,' she said.
The meteorite was previously on exhibit at the Italian Space Agency in Rome. Sotheby's did not disclose the owner.
Bidding for the juvenile Ceratosaurus nasicornis dinosaur skeleton started with a high advance bid of $6 million, then escalated with offers $500,000 higher than the last and later $1 million higher than the last before ending at $26 million.
The official sale price was $30.5 million with fees and costs. The original estimate was $4 million to $6 million.
Parts of the skeleton were found in 1996 near Laramie, Wyoming, at Bone Cabin Quarry, a gold mine for dinosaur bones. It's more than 6 feet (2 meters) tall and nearly 11 feet (3 meters) long.
Specialists assembled nearly 140 fossil bones with some sculpted materials to recreate the skeleton and mounted it so it's ready to exhibit, Sotheby's says.
The skeleton is believed to be from the late Jurassic period, about 150 million years ago, Sotheby's says.
Ceratosaurus dinosaurs were bipeds with short arms that appear similar to the Tyrannosaurus rex, but smaller. Ceratosaurus dinosaurs could grow up to 25 feet (7.6 meters) long, while the Tyrannosaurs rex could be 40 feet (12 meters) long.
The skeleton was acquired last year by Fossilogic, a Utah -based fossil preparation and mounting company.
Wednesday's auction was part of Sotheby's Geek Week 2025 and featured 122 items, including other meteorites, fossils and gem-quality minerals.
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