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Igneous Rock | One of the 3 Main Rock Types

an igneous rock

Inclusions in Rocks and Minerals

inclusions of black tourmaline in a transparent gemstone

Iridescence Caused by Multiple Reflections

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Iron | Metallic Chemical Element

a rough piece of the mineral iron

Iron Ore | Rock or Mineral Containing Iron

stack of reddish brown coloured rocks that are an ore of iron

Iron Oxides | Chemical Compounds of Iron and Oxygen

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