Chromite Sacrifice Essay

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1. Chromite is not magnetic and has a more resinous luster. Hematite has a red streak and it is not magnetic or weakly magnetic. Ilmenite has a black streak and weak magnetism. Cassiterite has a high specific gravity and brown color. Magnetite has a black streak and it is very magnetic.

2. Because in most of the cases the black oxides have a black streak as well; while this differs for black sulfides that can have a variety of brown streak.

3. Banded Iron formations were formed in the Precambrian by the reaction of iron that ocean had and oxygen. At that time there was not a presence of oxygen until when the cyanobacteria appeared and started to produce it. On the other hand, oceans were iron-rich during the Precambrian, so when the oxygen

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