Mineral 1.0Test your knowledge of specific minerals

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  SilicatePlagioclase
CaAl2Si2O8

Other names/forms:
Anothite (Ca), Albite (Na)

Most distinguishing features:
Parallel striations and white-gray colour separates this mineral from orthoclase (Kspar).

Industrial/economical uses:
Concrete, filler, sand, gravel, etc.

  SulfidePyrite (crystalline)
FeS2

Most distinguishing features:
Colour, hardness, streak and habit are best indicators. Gives off sparks when struck with a hard metal object.

Industrial/economical uses:
May be used as source of iron or sulfur, but not normally of economic value.

  SulfidePyrite (massive)
FeS2

Most distinguishing features:
Colour, hardness, streak and habit are best indicators. Gives off sparks when struck with a hard metal object.

Industrial/economical uses:
May be used as source of iron or sulfur, but not normally of economic value.

  OxidePyrolusite
MnO2

Most distinguishing features:
Will leave sooty marks if touched.

Industrial/economical uses:
Manganese is used to colour bricks.