This is a piece of a meteorite which fell in Namibia in prehistoric times, and was subsequently named after the nearest town, Gibeon. It is believed that when Gibeon passed through the atmosphere, it broke up and crashed to earth over a 275 km long and 100 km wide area. The Gibeon meteorite is prized for its patterned cross section which occurred after landing and cooling on the earth's surface. In the nineteenth century enormous specimens were recovered by European settlers which led to speculation that many of the smaller fragments had been collected by native people and made into tools. Radiometric dating places the age of crystallization of the iron-nickel metal in the Gibeon at 4 billion years.