The hardest material just prior to diamond in Mhos scale is_________________?
Correct answer: C. Corundum
- A. Topaz
- B. Carborundum
- C. Corundum
- D. Calcite
Explanation
On the standard Mohs scale, corundum has a hardness of 9 and diamond has 10, making corundum the mineral immediately below diamond. Carborundum is very hard, but it is not part of the conventional ten-mineral Mohs scale.
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