Materials and hardness: What is considered the hardest naturally occurring substance on Earth in standard general-knowledge contexts? Answer based on conventional Mohs hardness scale used in examinations. Choose the correct substance.
General Knowledge
General Science
Difficulty: Easy
Choose an option
Answer
Correct Answer: Diamond
Explanation
Given data
- Asks for the hardest naturally occurring substance on Earth.
Concept/ApproachOn the conventional Mohs scale, diamond is rated 10 (the highest). Though some lab or rare phases may approach/exceed diamond in specific properties, standard GK/competitive exams accept diamond as the correct response.
Step-by-step reasoningDiamond's strong sp3 covalent bonding in a tetrahedral lattice yields exceptional hardness.
Common pitfallsChoosing dense or precious metals (gold, platinum) which are not the hardest.
Final AnswerDiamond