Quantity: 1 pound Average size range: 2.5 to 3.5 inches Meteorites form when comets, asteroids, or meteoroids successfully enter Earth’s atmosphere and reach the ground. Meteorites are usually classified in three broad groups: stony meteorites that may also include small round silica formations, iron meteorites, and stony-iron meteorites, which are the rarest. Iron and stony-iron meteorites may also be magnetic.
Meteorites or tektites are gravel-sized bodies composed of black, green, brown, or grey natural glass formed from terrestrial debris ejected during meteorite impacts. tektites are a form of natural glass that was formed via high velocity and extreme heat.