Gemstone A meteorite is a solid piece of debris from a source such as an asteroid or a comet, which originates in outer space and survives its impact with the Earth's surface. Using a metal detector these are found by Adam's friend in the deserts and fields of Argentina, in large craters in Campo Del Cielo; hence the name. Falling to the earth millions of years ago, they are a composition of nickel and iron in the form a rough droplet - the shape that they formed as they fell to earth!
