Diamond. a very hard material that is the hardest substance ever, or at least discover to be the hardest substance on EARTH THAT IS
diamonds are the hardest
Diamonds are the hardest mineral and the agate is the secod hardest mineral.
From what I hear, One is the hardest & Master of Puppets is second hardest.
Diamond is the hardest precious stone
the hardest i can think of is "What is the answer to this question?"
Madagascar is the hardest to fake.
Expert is the hardest.
yes.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The hardest matter on earth is Diamond.
the hardest precious stone is the diamond
The rottweiler has the hardest bite.