Mineral 1.0Test your knowledge of specific minerals

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  SulfateSelenite
CaSO4 - 2H2O

Other names/forms:
Gypsum

Most distinguishing features:
Single large crystals of gypsum, typified by hardness and transparency.

Industrial/economical uses:
Used in gypsum wallboard.

  CarbonateSiderite
FeCO3

Most distinguishing features:
Identified by colour and hardness.

Industrial/economical uses:
Sometimes used as an iron ore. Also used in pigments where a red or brown colour is desirable.

  SulfideSphalerite
ZnS

Most distinguishing features:
Low specific gravity distinguishes it from galena, as does colour. Lustre also indicative.

Industrial/economical uses:
Main ore of which zinc is extracted.

  SilicateStaurolite
Fe2Al9O6(SiO4)4(O,OH)2

Most distinguishing features:
The "staurolite cross" and colour are indicative.

Industrial/economical uses:
Used as an abrasive due to its high hardness.

  SulfideStibnite
Sb2S3

Most distinguishing features:
Colour and small subhedral crystals are indicators. Also rather soft.

Industrial/economical uses:
Important source of antimony (Sb)