Iron was from surface brown ore smelted by charcoal fires.
2.
Also, by the early 1960s, higher-yielding brown ores from other regions were feeding the blast furnaces.
3.
Actually, the emeralds were cemented with pitch into a kind of brown ore to create the illusion of something natural-- an example of man-made wonderment.
4.
On May 27th, 1911, approximately 8pm, the first of the ore was loaded aboard the steamer Alva, which would then carry its relatively small 3500-ton load to the Rogers Brown Ore Company furnaces at Buffalo, NY.
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