Which of the following mineral does not contain Al?

Options

A. Cryolite
B. Mica
C. Feldspar
D. Fluorspar

Explanation

To determine which of the following minerals does not contain aluminum (Al), we will analyze each option provided:

1. **Cryolite (Na3AlF6)**:
- Cryolite is known to be a mineral that contains aluminum. Its chemical formula includes aluminum as one of its components.
- **Conclusion**: Cryolite contains Al.

2. **Mica**:
- Mica is a group of silicate minerals that often contain aluminum in their structure. While the amount may vary, aluminum is typically present in mica.
- **Conclusion**: Mica contains Al.

3. **Feldspar**:
- Feldspar is another group of silicate minerals that contain aluminum. The general formula for feldspar can be represented as KAlSi3O8 or NaAlSi3O8, indicating the presence of aluminum.
- **Conclusion**: Feldspar contains Al.

4. **Fluorspar (CaF2)**:
- Fluorspar, also known as fluorite, is primarily composed of calcium fluoride and does not contain aluminum in its structure.
- **Conclusion**: Fluorspar does not contain Al.

After analyzing all the options, the mineral that does not contain aluminum is **Fluorspar (Option D)**.

### Final Answer:
**Fluorspar (D)** does not contain aluminum.