| El Chaco was discovered with a metal detector in 1967. It is the second-biggest meteorite ever found.|
In 1990 an Argentine highway police officer foiled a plot to steal it for sale to a private US collector.
|Campo del Cielo meteorite is classified in Group I, , 6.68% Ni, 0.43% Co, 0.25% P, 87 ppm Ga, 407 ppm Ge, 3.6 ppm Ir.|
Almost all of the remaining portion of the meteorite is iron.
"Las Víboras" fragment found in Campo del Cielo
Campo del Cielo meteorite, El Chaco fragment
:Campo del Cielo meteorite, El Chaco fragment