Multiple choice general knowledge science & technology

On the Mohs Hardness Scale, a diamond is a:

  1. 1

  2. 3

  3. 7

  4. 10
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diamond ranks 10 on the Mohs Hardness Scale, making it the hardest known natural mineral. The scale runs from 1 (talc, softest) to 10 (diamond, hardest), with each mineral able to scratch those below it.

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