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Identify the statement that is not correct among the following:

1. Calamine and siderite belong to the carbonate group.
2. Argentite and cuprite are classified as oxides.
3. Zinc blende and iron pyrites are sulphide minerals.
4. Malachite and azurite are ores of copper.

Correct answer: Argentite and cuprite are classified as oxides.

Solution

The statement is incorrect because argentite is actually a silver sulfide (Ag2S), while cuprite is a copper oxide (Cu2O). Therefore, classifying both as oxides is inaccurate.

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