Wolframite Group: Mineral information, data and localities.

Note: "Wolframite" usually has a chemical composition covering the range between Hübnerite and Ferberite. Rarely, "wolframite" could also correspond to

Wolframite mineral information and data

Wolframite mineral information and data

Wolframite mineral information and data

Wolframite mineral information and data

Scheelite: Mineral information, data and localities.

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Niobium - Wikipedia

Native metal - Wikipedia

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Wolframite Group: Mineral information, data and localities.

Wolframite mineral information and data