Copper Ore Identification: Malachite Analysis

The question asks to identify which of the listed minerals is a copper ore.

Mineral Ore Identification

We need to examine each option to determine its primary use or the metal it yields:

• Haematite: This is primarily an iron ore. It is the main source of iron for the world.
• Chromite: This is the main ore of chromium. It's also a source of iron.
• Malachite: This is a copper carbonate hydroxide mineral. It is considered an important copper ore, often found with azurite. Its chemical formula is approximately $\text{Cu}_2\text{CO}_3(\text{OH})_2$.
• Magnetite: This is another significant iron ore, known for its magnetic properties.

Conclusion on Copper Ore

Based on the analysis, Malachite is the only mineral listed that is a significant source of copper.

Therefore, the correct option is Malachite.