Scientists discovered a swarm of asteroids coming near Mincraftia. Should they be attracted by the gravitation of our planet and not be destoyed by the atmosphere or technology, extreme devastation in the areas of the impact, stronger than the most destructive meltdown of a reactor of the Chernobyl II type, should be expected. Rumors that the asteroids contain iridium are not confirmed.
A few weeks later
...57 people were killed in the latest impact.
Scientists discovered a way to refine the extraminecraftial iridium into a usable form by combining it with artificial matter and exposing it to neutron radiation in a nuclear reactor. The iridium prices are dropping quickly.
The world record in Creeper Killing was broken by...
Summary: If asteroid impacts get added and if asteroids contain iridium, impacts should cause explosions that are larger that the explosions of six-chamber-reactors filled with uranium cells, but there should be a way to destroy asteroids before impact. Rarely you can find unpure iridium in a crater. If you combine it with some UUM and put it in a cell (Maybe 4 UUM, a piece of unpure iridium and a cell) you can "breed" it in a reactor to get an iridium cell which can be used instead of iridium ore.
this, I am ok with. I just want iridium to be a uumater only resource, so this is great