Another diamond.
Diamond. Curious, perhaps, that the hardest substance known can be shattered - but not scratched or cut.
No natural substance is equal in hardness to a diamond.
A jeweler would use another diamond to cut a diamond.
Another diamond is the only substance hard enough to cut diamond.
Yes.
Diamond
A diamond
Diamond
The hardest naturally occurring substance is called diamond. It is a form of carbon.
Only another diamond is hard enough to cut a diamond. Diamonds are the hardest mineral, scoring a 10 on the Mohs scale of hardness.
diamond
The only substance capable of cutting diamond would be it's self. Now, Lasers can also cut diamonds. But I don't consider lasers a substance.