What is the hardest substance known to man?
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What is the hardest substance known to man?

A:

Quick Answer

The hardest known substance is lonsdaleite, also called hexagonal diamond, according to a study published in Physical Review Letters and reported on Phys.org. Lonsdaleite is 58 percent stronger than diamond, which was previously considered to be the hardest substance.

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Also harder than diamond is wurtzite boron nitride, or w-BN, which has a greater indentation strength than diamond, said Phys.org. Lonsdaleite and w-BN are both substances created by scientists by using large compressive pressures under indenters, a process that changes the atomic structures of the substances to make them especially strong. These super hard substances are useful in technology, especially because they also remain stable at extremely high temperatures, which diamond cannot do. Diamond remains the hardest natural substance known to man.

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