Diamonds are the hardest mineral on earth.
Diamonds are the hardest.
Yes, diamonds are the hardest natural mineral on earth.
because diamonds are the hardest rock or mineral
Diamonds are the hardest mineral known: hence their value as a cutting material.
Diamonds are the hardest mineral and the agate is the secod hardest mineral.
Diamonds are the hardest mineral, but not the 'strongest'.
Diamonds are the hardest mineral on earth.
Diamonds are the hardest.
no diamonds are
Diamond is the hardest mineral known.
Yes, diamonds are the hardest natural mineral on earth.
Diamonds can only be scratched by other diamonds. Diamond is the hardest natural mineral.
because diamonds are the hardest rock or mineral
Diamonds are uniquely, that hardest mineral on earth.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
diamonds