The air of course!
The hardest substance that is naturally occurring is a diamond. However, there are harder substances that have been made by scientists in labs.
The hardest substance in the human body is tooth enamel.The enamel that coats your teeth is the hardest substance in the human body.enamel of your teeth?
Diamonds.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
Enamel is the hardest substance in the human body.
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.
Diamond is the hardest 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
Its Tungsten
No, diamond is the hardest known natural substance in the world.
No,diamond is the hardest known substance on Earth.
Diorite is the second hardest rock in the worl - Vellond
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The hardest substance that is naturally occurring is a diamond. However, there are harder substances that have been made by scientists in labs.
Diamonds are the hardest known substance
Diamond. a very hard material that is the hardest substance ever, or at least discover to be the hardest substance on EARTH THAT IS
One possibility is the word diamond. Diamonds are the hardest substance in the world.