Brown iron ore Abundant.
"Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 (of 2)" by James Emerson Tennent
Obtain specimens of the following iron ores: Hematite, brown hematite, magnetite, carbonate, and pyrites.
"Commercial Geography" by Jacques W. Redway
In addition, iron ores (almost all brown hematite) occur abundantly, and all material for making steel of excellent quality.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various