What is gangue ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Gangue**: Gangue refers to the unwanted materials or impurities that are found alongside the desired minerals in an ore.

2. **Composition of Gangue**: These impurities can include various types of minerals, such as silicates, carbonates, and oxides, which do not have any economic value.

3. **Role in Mining**: During the extraction of metals from ores, gangue is separated from the valuable minerals. The process of separating gangue from ore is crucial in the mining industry to ensure that only the valuable components are processed.

...