Mineral 1.0Test your knowledge of specific minerals

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  CarbonateCalcite (massive)
CaCO3

Most distinguishing features:
Recognized by hardness and cleavage. Dolomite and aragonite have higher densities.

Industrial/economical uses:
Used in the manufacture of portland cement (quicklime). Also used as a pharmaceutical (antacids, calcium supplements).

  CarbonateCalcite (sparry)
CaCO3

Other names/forms:
Iceland Spar

Most distinguishing features:
Hardness, crystal habit and twin striae are typical.

Industrial/economical uses:
Used in the manufacture of portland cement (quicklime) and in the pharmaceutical industry.

  SilicateChalcedony
SiO2

Other names/forms:
Micro/Cryptocrystalline Quartz

Most distinguishing features:
Identified by hardness and texture/habit.

Industrial/economical uses:
Used for making glass and as a source of Silicon.

  SulfideChalcocite
Cu2S

Most distinguishing features:
Black colour with sooty appearance on weathered surfaces and sectile character are distinctive. Bronze-yellow on fresh surfaces.

Industrial/economical uses:
Mined as a source of copper.

  SulfideChalcopyrite
CuFeS2

Most distinguishing features:
Distinctive brassy-green colour. Has a richer yellow colour than pyrite and a lower hardness.

Industrial/economical uses:
Mined for its copper which has innumerable industrial uses.

  SilicateChlorite
(Mg,Fe,Al)3(Si,Al)4O10(OH)2

Most distinguishing features:
Colour and its low hardness are distinguishing characteristics.

Industrial/economical uses:
None, however chlorite schist sometimes does have ornamental uses.

  OxideChromite
FeCr2O4

Most distinguishing features:
Resembles magnetite and ilmenite, but not very magnetic and has a more resinous lustre.

Industrial/economical uses:
Only ore mineral for chromium.

  SilicateChrysotile
Mg3Si2O5(OH)4

Other names/forms:
Serpentine

Most distinguishing features:
Habit and colour and most indicative properties.

Industrial/economical uses:
Used in 98% of world's production of asbestos.

  Native elementCopper
Cu

Most distinguishing features:
Colour and metallic characteristics are diagnostic.

Industrial/economical uses:
Used as electrical wire due to electrical conductivity and relatively low price.

  OxideCorundum
Al2O3

Most distinguishing features:
Hardness is best indicator, crystal habit is good too.

Industrial/economical uses:
Used as a gemstone. High-quality ruby can be more valuable than diamond. Corundum is also used as an abrasive in sandpaper, polishing compounds, etc.