Multiple choice general knowledge

This is the hardest natural substance found on earth.

  1. Platinum

  2. Diamond

  3. Jade

  4. Granite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diamond is the hardest known natural substance on Earth, ranking 10 on the Mohs scale of mineral hardness. Its hardness comes from the strong covalent bonds between carbon atoms in its crystal structure. This property makes diamond ideal for industrial cutting and drilling applications, as well as its famous use in jewelry.

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