Stony meteorites are one category of meteorites. They contain significant amounts of silicon and oxygen. They also have smaller quantities of iron, magnesium and other elements. Chondrites are a subgroup of the stony meteorites. They are from the same material that the planets developed from. The metal phase of chondrites contains more than 99 percent of the meteorite's iron and cobalt. It also contains at least 90 percent of its other elements, such as platinum and gold.
Another major meteorite category is the stony-iron meteorites. These meteorites developed from the inner crust of a melted asteroid. Stony-iron meteorites have about equal amounts of silicon-based stone and iron-nickel metal.
Iron meteorites come from the metallic core of the asteroids that melted and formed stony-iron meteorites. They mostly contain iron and nickel.
Meteorites and meteors contain a number of other elements other than those found in large amounts in the major meteorite forms. Fluorine appears in low concentrations in a number of minerals present in meteorites. Zinc, gallium, tin, antimony, germanium, arsenic, rubidium, strontium, zirconium, niobium, molybdenum are other elements found in meteorites.