diamonds are one of them
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The hardest rocks show the least effects from erosion and weathering and may cap a less resistant rock.
Diamond is the hardest substance in the world
Time.
yes.
Hardest Mineral=Diamond Second would be corundum.etc. etc....but these are minerals. Rocks are a combination of at least 2 minerals. A hard "rock" would be nearly any mafic, igneous rock.
c b s e is the hardest course in the world
30 on the WORLD'S HARDEST GAME on AddictingGames
No, diamond is the hardest known natural substance in the world.
no thats why it is the world hardest game
Pokemon Rocks Hardest
It's been awhile since I played, but in my opinion, "Play With Me" is the hardest. I have trouble playing that song on medium!