Well, materials may feel colder than others because they could:
- Be stored in cold temperatures
 - Underground
 - Next to the ocean
 
So those are why they may feel colder
But . . . 
Some items could be hotter becuase:
- Near hot source ( volcano )
 - Gas pockets ( that realese hot “ temperatures “
 
Those are my reasons why they can either be colder or hotter