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Quiz "Which mineral am I?"

Which mineral am I?

a colourless or white mineral (occasionally tinged with impurities), found in sedimentary and metamorphic rocks, in veins, in limestone, and in stalagmites and stalactites. It is used in the manufacture of cement, plaster, paint, glass, and fertilizer. Composition: calcium carbonate. Formula: CaCO3. Crystal structure: hexagonal (rhombohedral)

Which mineral am I?

a red or black mineral consisting of hydrated ferric oxide. Formula: Fe2O3.nH2O

Which mineral am I?

a green, grey, or white fibrous mineral, a variety of serpentine, that is an important source of commercial asbestos. Formula: Mg3Si2O5(OH)4

Which mineral am I?

a yellow mineral consisting of arsenic trisulphide in monoclinic crystalline form occurring in association with realgar: it is an ore of arsenic. Formula: As2S3

Which mineral am I?

an impure microcrystalline form of quartz consisting of a variegated, usually banded chalcedony, used as a gemstone and in making pestles and mortars, burnishers, and polishers. Formula: SiO2
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