How do long do rocks last

Question: How do long do rocks last
- Keywords:
  rocks
Asked by Niamh to Jess, Jenny on 17 Nov 2019.
- Jessica Franklin answered on 17 Nov 2019:
  
  Some rocks are harder than others so they are more difficult to breakdown, therefore they can last for millions, or in rare case even billions of years!!! Other rocks however are relatively “softer” and can be broken down by wind, water or ice much easier.

Question: How do long do rocks last