The Zagami meteorite, of which this is a 52.2 gram fragment, fell in Nigeria in October 1962. Though it is basalt, like that found on Earth; the feldspar has been converted to a mineral called maskelynite through shock. Analysis found that the gas trapped in this meteorite was typical of those found in the Martian atmosphere, as compared with that sampled by the Viking-Mars landers in 1976. This specimen also shows a glossy fusion crust formed as it fell through the Earth’s atmosphere and melted. About 18.1 tons of this meteorite have been found in total and this type of meteorite is a basalt rock termed Shergottite.