Galena is a important mineral of _____.

Explanation

**Step-by-Step Solution:**

1. **Identify the Mineral**: The question asks about Galena, which is a specific mineral.

2. **Chemical Composition**: Galena is known to have the chemical formula PbS. Here, Pb stands for lead and S stands for sulfur.

3. **Classification of Galena**: Galena is classified as a sulfide mineral, and it is recognized as the most abundant sulfide mineral.

4. **Determine the Element**: Since Galena contains lead (Pb) in its composition, it is primarily associated with lead.

5. **Conclusion**: Based on the information gathered, we can conclude that Galena is an important mineral of lead.

**Final Answer**: Galena is an important mineral of lead.

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