There used to be a humorous comment about this ore but Zeme removed it because he has no sense of humour whatsoever.
Iron Rocks are a resource in the game and is generally found in the outer edges of the of the universe.
For every 10 Iron Rocks you refine, you get 1 Iron Block back. To refine rocks, you need them to be in a warehouse.
Iron can be found in virtually all sectors, but here is a list of the most common locations where Iron Rocks can be found (incomplete list) :
Iron BlockEditIron Blocks are the result of 10 refined Iron Rocks.