How well do you know economic ores, their appearance and their chemical formulae?
When typing in formulae, don't worry about subscript values. When an equation can contain one of two different elements, use a comma "," to separate the two.
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FeSO4
Fe3O4
Au
FeTiO3
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Ilmenite
Bornite
Pentlandite
Azurite
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Bornite
Azurite
Chromite
Cassiterite
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True
False
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Malachite
Cuprite
Barite
Cinnabar
Cassiterite
Chromite
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Silver
Pink
Black
Blue
Yellow
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Magnetic
Acircular
Vitreous
Silvery
Transparent
Crystals have growth lines perpendicular to long axis
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