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What is the hardest substance in the world?

8 Answers
my question for members is : what is the hardest substance in the world?, please answer it thanks 4 all
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It is an old cliche that says " only a diamond can cut another diamond", What makes a diamond very hard? as far as I can remember in my chemistry class, the properties that makes a diamond a hard material is the the long process that takes billions of years under the earths crust of heating the carbon(which makes up a diamond). Another thing is the valance electron that is well bonded to each other which is the most perfect and complete compared to other elements.

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Diamond is the hardest natural material known, but there are artificial materials that scientists have created that are harder, such as graphene and nanodiamonds.

The word hardness is often misunderstood by people, because scientists sometimes have different definitions of words. While diamonds are hard, they can be smashed to pieces with a hammer if you just hit the right spot. Hardness and strength mean different thing in science.

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Diamond is the hardest substance in the world and can scratch for instance glass and other materials.
Diamond particles are used in abrasive disks for cutting concrete.
Diamonds were also used in the stylus of record players because they are hard and don't wear rapidly.

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Diamond is the hardest substance in the world. The term comes from the ancient Greek word "adamas" which means "unbreakable". Diamond is an allotrope of carbon.

Photo source: diamondvues.com

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The hardest substance in world is lonsdaleite , which is discovered by scientists to be 58% harder than diamond .
so diamond is no longer the hardest substance in the world

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DIAMOND is the hardest substance on the earth.Its used for drilling for oil and gas.Its bonding is extremely strong which causes its melting point to be 3730 degree celcius.:)

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Diamond is the hardest natural substance that is in our environment but there are harder substances that are chemically, or nano induced.

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The hardest substance in the world is diamond. Only a diamond can cut a diamond.

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