Apatite is an ore of:

Explanation

To solve the question "Apatite is an ore of:", we need to identify the components of apatite and what it is primarily used for.

### Step-by-Step Solution:

1. **Identify the Chemical Formula of Apatite**:
- Apatite is a mineral that is commonly represented by the formula \( \text{Ca}_5(\text{PO}_4)_3\text{F} \).
- This indicates that it contains calcium (Ca), phosphate (PO₄), and fluorine (F).

2. **Determine the Main Elements**:
- From the formula, we can see that apatite consists mainly of:
- Calcium (Ca)
- Phosphate (PO₄)
- Fluorine (F)

3. **Identify the Ore**:
- Apatite is primarily considered an ore of:
- **Calcium**: because it is a significant source of calcium.
- **Fluorine**: because it contains fluorine in its structure.
- It is also a source of phosphorus, but the question specifically asks for the ore.

4. **Conclusion**:
- Therefore, we can conclude that apatite is an ore of **Calcium (Ca)** and **Fluorine (F)**.

### Final Answer:
Apatite is an ore of Calcium and Fluorine.

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