Anti-Matter Meteorite

The Anti-Matter Meteorite was a solid piece of debris that originated in outer space and was composed solely of.

History
Coming from outer space, the Anti-Matter Meteorite set a trajectory to the coast of Miami, and it would have splashed down with an impact strength that would have devoured the city. However, S.H.I.E.L.D. was able to stop the meteorite before the public opinion knew of the potential catastrophe.

The meteorite was later used by Phil Coulson as an example of how keeping dangerous events quiet and contained is very important to avoid spreading panic amongst the population when Skye thought about warning the people who lived around Llactapata in Peru of the potential danger of the 0-8-4 discovered there.