_________is an ore of aluminium.

Explanation

To answer the question "_________ is an ore of aluminium," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Ore**:
- An ore is a naturally occurring rock or mineral from which a metal can be extracted profitably. It contains enough of the metal to make extraction economically viable.

2. **Identifying the Metal in Question**:
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