A large block of native iron and weighing approx 20 tonnes. It was brought to the Naturhistoriska riksmuseet in Stockholm Sweden in 1870 by boat and horse-drawn carriage from Greenland's West Coast by Adolf Erik Nordenskiöld to a large fanfare.
Naturally occurring native iron is very rare in the Earth's crust simply because iron corrodes. Nordenskiöld, who was professor of Mineralogy at the museum, was therefore convinced that this was an iron meteorite.
The block is still there outside the Museum's Southern Façade today, almost impossible to steal and incredibly valuable - if you are a native element collector!