Hoba Meteorite (also known as Hoba West) is an iron meteorite housed on a farm near Grootfontein, Namibia that ways approximately 60 tonnes (the same weight as 6 elephants!) and thought to be the largest whole, fallen meteorite on the Earth's surface.
It is in fact 16% nickel and 84% iron, and thought to be discovered by a farmer while ploughing a field in 1920, but it was thought to of actually fell 80,000 years ago.
It's biological classification is ataxite, a type of iron. Ataxite is consisted of taenite, plessite and troilite. Iron hydroxides are on the back and was named after the farm it was found on, called Hoba West.