SCIENCE
EARTH SCIENCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Diamond
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Silicate
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Native Gold
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Muscovite
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Detailed explanation-1: -Diamond is the hardest known mineral. It is a high-symmetry allotrope of carbon (C). It has a Mohs “scratch” hardness of 10, which makes it the hardest mineral.
Detailed explanation-2: -While diamonds may be the hardest naturally occurring substance found on earth, he explains, they are not the hardest available (there are two harder substances-a laboratory synthetic nanomaterial called wurtzite boron nitride and a substance found in meteorites called lonsdaleite).
Detailed explanation-3: -The heat and pressure causes the diamonds molecules to change so that they’re so close together, the molecules can’t move (known as covalent bonding). The closeness of these molecules forms a rigid bond, therefore making the diamond hard.
Detailed explanation-4: -It is well-known since the late 20th-century that there’s a form of carbon that’s even harder than diamonds: carbon nanotubes. By binding carbon together into a hexagonal shape, it can hold a rigid cylindrical-shaped structure more stably than any other structure known to humankind.
Detailed explanation-5: -Scientists have found a mineral stronger than diamond Scientists have found a mineral stronger than diamond. They say lonsdaleite could be used to fortify industrial tools like drill bits and saw blades-AND teach us about the evolution of earth.