The Biggest Piece of Mars on Earth Is Going Up for Auction in New York

A Martian meteorite, weighing 54.388 lbs. (24.67 kg), said to be the largest piece of Mars on Earth, estimated at $2 - 4 million, is displayed at Sotheby's, in New York City on July 9, 2025. Richard Drew/AP Photo

NEW YORK—For sale: A 54-pound rock. Estimated auction price: $2 million to $4 million. Why so expensive? It’s the largest piece of Mars ever found on Earth.

Sotheby’s in New York will be auctioning what’s known as NWA 16788 on Wednesday as part of a natural history-themed sale that also includes a juvenile Ceratosaurus dinosaur skeleton that’s more than 6 feet tall and nearly 11 feet long.