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Which one of the following mineral–formula pairs is mismatched?

1. Magnetite – Fe3O4
2. Copper glance – Cu2S
3. Calamine – ZnCO3
4. Zincite – ZnS

Correct answer: Zincite – ZnS

Solution

Zincite is zinc oxide (ZnO); ZnS is zinc blende/sphalerite. Magnetite Fe3O4, copper glance Cu2S, and calamine ZnCO3 are all correctly matched, so the Zincite-ZnS pair is the mismatched one.

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