the best quality of iron ore is
Hi Aspirant,
The best quality of iron ore is Haematite with 70% metallic content having reddish and coral red color.It is the premium quality iron ore and is the most preferred raw material in most of the mills.Magnetite is also one such iron ore which comes just after Haematite.The formula of these iron ores are FE2O3 and FE3O4.
Hope it helps!!