Multiple choice general knowledge science & technology

What mineral is the hardest substance known and an allotrope of carbon

  1. Zircon

  2. Quartz

  3. Garnet

  4. Diamond
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diamond is the hardest known natural mineral on the Mohs scale (rating 10) and is a pure allotrope of carbon, meaning it consists entirely of carbon atoms arranged in a crystal lattice structure. Zircon, quartz, and garnet are much softer minerals with different chemical compositions.

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