Top 10 Hardest Materials

No 2. Lonsdaleite

Lonsdaleite is also knows as hexagonal diamond and is formed when meteorites containing graphite strike the Earth, so it is pretty rare. It is translucent, brownish-yellow in color and purest form of it is more than 50 percent harder than diamond.

No 1. Wurtzite boron nitride

Wurtzite boron nitride has a structure very similar to that of a diamond but with a few improvements making it very much stronger than it. Wurtzite boron nitride is also extremely rare and is produced during volcanic eruptions.

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