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Red with creamy associated silicate mineral.
Zincite (ZnO)
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Black, Soft, usually powder, doesn't come off, fibrous crystals
Pyrolusite (MnO2)
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Darker, Dense
Cassiterite (SnO2)
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grey, dark grey
Brookite (TiO2)
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Reddish Brown
Rutile (TiO2)
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Little Cube
Uraninite (UO2)
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Hexagon, Hard (9), Any color
Corundum (Al2O3)
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Specular/oolitic/micaceous, red streak, non-magnetic
Hematite (Fe2O3)
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Not fibrous, metalic, darker and blacker than rutile
Ilmentile (FeTiO3)
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Octohedral crystals rare, rusty, magnetic, good sized, massive
Magnetite (Fe3O4)
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Little baby octohedrals
Spinel (MgAl2O4)
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Dense, like magnetite but not magnetic
Chromite (FeCr2O4)
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Black Mineral in Zincite, associated with creamy zinc mineral
Franklinite (ZnFe2O4)
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Black, ugly
Columbite (Fe, Mn)(Nb, Ta)2O6
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