Which mineral among Fluorite, Apatite, and Feldspar has the middle Mohs hardness?

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Multiple Choice

Which mineral among Fluorite, Apatite, and Feldspar has the middle Mohs hardness?

Explanation:
Mohs hardness measures scratch resistance on a numerical scale. Among these minerals, Fluorite is about 4, Apatite about 5, and Feldspar about 6. The middle value is 5, which corresponds to Apatite, so it has the middle Mohs hardness. Fluorite is softer than Apatite, and Feldspar is harder.

Mohs hardness measures scratch resistance on a numerical scale. Among these minerals, Fluorite is about 4, Apatite about 5, and Feldspar about 6. The middle value is 5, which corresponds to Apatite, so it has the middle Mohs hardness. Fluorite is softer than Apatite, and Feldspar is harder.

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