Mineral 1.0Test your knowledge of specific minerals

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  SulfideGalena
PbS

Most distinguishing features:
Gives off a rotten-egg smell in HCl, very high SG, very metallic lustre.

Industrial/economical uses:
Main ore from which lead is extracted, also a source of silver.

  SilicateGarnet
(Mg,Fe,Ca)3Al2(SiO4)3

Other names/forms:
Pyrope, Grossular, Almandine

Most distinguishing features:
Crystal habit, colour and hardness.

Industrial/economical uses:
Abrasives (particularly sandpaper), semi-precious gemstone.

  Native elementGraphite
C

Most distinguishing features:
Softness and lustre are best indicators.

Industrial/economical uses:
Used in pencil leads and as a dry lubricant.