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The air of course!

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Q: What is the second hardest substance in the world?
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Which is the second natural hardest substance in the world?

The second hardest substance in the world is mineral lonsdaleite, or hexagonal diamond. It's made up from the same materials as diamonds, but it has a slightly different structor. Mineral lonsdaleite is extremely rare in nature.


Which is te hardest subatance in the world?

Diamond is the hardest substance in the world


What is the hardest naturally occurring substance in the world?

Diamond use to be the hardest known natural substance now it is the mineral lonsdaleite at 58% stronger then diamond is the first the second hardest is wurtzite boron nitride at 18% stronger then diamonds they are both extreamly rare natural minerals sources http://www.newscientist.com/article/dn16610-diamond-no-longer-natures-hardest-material.html


Which is the second hardest substance after diamond on earth?

Its Tungsten


Is ice the most hardest thing in the world?

No, diamond is the hardest known natural substance in the world.


Is graphene is hardest thing in the world?

No,diamond is the hardest known substance on Earth.


What is the second hardest rock in the world?

Diorite is the second hardest rock in the worl - Vellond


Is boron nitride the second hardest substance after diamond known to man?

YeS...


What is the second hardest natural substance on earth?

The hardest substance that is naturally occurring is a diamond. However, there are harder substances that have been made by scientists in labs.


What is the hardest substance of all?

Diamonds are the hardest known substance


Which nature-substance is the hardest?

Diamond. a very hard material that is the hardest substance ever, or at least discover to be the hardest substance on EARTH THAT IS


What is a 7 letter word for a hard substance?

One possibility is the word diamond. Diamonds are the hardest substance in the world.