Diamond is still the hardest substance known to man. Various carbides such as tungsten carbide, boron carbide, and silicon carbide are also extremely hard, but you will notice that they all contain carbon (diamond is pure carbon - the rest are carbon compounds.)
The hardest mineral is diamond, which has a hardness of 10 on the Mohs scale.
Diamond is the mineral that has a hardness of 10 on the Mohs scale. It is the hardest naturally occurring substance.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The answer is a dimond
On the Mohs scale of relative mineral hardness, diamond is the hardest at 10.
The hardest mineral is diamond, and the softest mineral is talc.
Diamond is the hardest mineral known.
Diamonds are the hardest mineral and the agate is the secod hardest mineral.
Diamond is the hardest mineral on earth.
Diamonds are the hardest mineral, but not the 'strongest'.
The hardest mineral is diamond, and the softest mineral is talc.
Diamond is the hardest mineral, scoring a perfect 10 on the Mohs scale of mineral hardness.
i think sulfur is the softest and crystal is hardest
A diamond and talc
The softest known mineral is 'TALC'. The hardest known mineral is 'DIAMOND' (according to Friedrich Mohs scale)
The hardest mineral is diamond, which has a hardness of 10 on the Mohs scale.
The diamond is the hardest rock (or mineral).