What is the name given to iron ore?
Haematite is an example of one of the many types of iron ore.
Do you mean the technical name for iron ore? Your question is not clear. Go to google and type iron ore, maybe it will give you some idea on what you are asking for.
don't do it. DOT 3 and DOT 4 are made of different stuff and if mixed together they will form a gel and then no brakes at all. Top off with whichever kind is already in there.