Diamond is the hardest mineral on earth.
The diamond is the hardest rock (or mineral).
Diamond is the hardest natural mineral on earth, measuring 10 on the Mohs scale, where 10 is the hardest mineral.
Yes, diamond is the hardest mineral on earth.
Diamond is the hardest mineral known.
No. Diamond is a hard mineral, the hardest natural mineral on earth.
Diamond is the hardest mineral on earth.
Diamonds are the hardest mineral on earth.
Diamond is the hardest mineral on earth.
Diamond is the hardest mineral on earth.
Diamonds are uniquely, that hardest mineral on earth.
Diamond is the hardest mineral on earth.
Diamond mineral is the hardest natural mineral on earth, which makes it the most durable of any mineral.