• Mineralogists divide minerals into groups based on chemical composition.
  • Most minerals fit into one of eight mineral groups.
  • Silicates are the largest mineral group and make up over 90% of Earth's crust.
  • Calcite contains calcium, carbon, and oxygen.
  • Oxides contain one or two metal elements combined with oxygen.
  • Turquoise contains copper, aluminum, and phosphorus.
  • Magnetite contains four iron atoms and the word “magnet’s” in the name.
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