[![enter image description here]] I have a 99.99% pure iron meteorite. It is 4,902 grams.
I'm highly skeptical that a 99.99% pure iron meteorite would be a fragment of a natural solar system object. It's more likely you have a shard, maybe part of a bolt or some such (hmm, I just thought, even a bolt would be steel, not pure iron—maybe a part of a magnetic device?), from some re-entering satellite.
Natural metal meteorites are never pure iron, even the ones often called "iron meteorites". True, iron can be the major component, but there is always a significant fraction of nickel (4-30%), as described in this Washington University of St. Louis tutorial, and usually a few tenths of a percent of cobalt as well. This conflicts with "99.99% pure iron" (how reliable is the measurement?).
If you have access to chemical analysis facilities, check the nickel and cobalt content. If there's some there, it's probably a natural meteorite. If indeed it's pure iron, then it's probably a satellite remnant.