Start learning →

Which mineral stands at 10, the top of the hardness scale?

ATopaz gem
BQuartz
CDiamond
DCorundum
Answer & Solution
Correct answer: C. Diamond
1. Corundum is 9 and topaz 8. 2. Diamond is 10. 3. Quartz is 7. _Source: syllabus Fundamentals of Physical Geography, Chapter 5, Minerals and Rocks._
Practise this question with Quill — UPSC CSE →

Keep practising Physical Geography

Browse all Physical Geography questions for UPSC CSE, or explore more Geography topics.

Start a Physical Geography lesson →
Related questions
Water resource bingoType the numberSort cause, effect and fixUsable or unusable waterSlice the water wordsRun the water numbersPop the water cycle stepsCatch the water table drainers