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Minerals used to make nails and screws
Goethite Goethite and magnetite are minerals that contain a lot of iron and are used to make steel. Steel nails are coated in metals like zinc to stop them rusting. Zinc comes from the mineral sphalerite.

Together, these minerals make nails:

Magnetite Sphalerite
Goethite (top right), magnetite and sphalerite are used to make nails and screws

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