Geology · Mineralogy
How is the hardness of a mineral defined?
- 1The resistance a mineral offers to load imposed on it
- 2The resistance a mineral offers to decay and deterioration due to air
- 3The resistance a mineral offers to scratching or rubbing action✓
- 4The resistance a mineral offers to pressure imposed on it
Correct answer
The resistance a mineral offers to scratching or rubbing action
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