Question

Which one of the following is the hardest mineral?
a. Topaz
b. Diamond
c. Quartz
d. Feldspar​

Answer 1

Answer:

Currently, diamond is regarded to be the hardest known material in the world. But by considering large compressive pressures under indenters, scientists have calculated that a material calledwurtzite boron nitride (w-BN) has a greater indentation strength thandiamond.

Explanation:

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Answer 2

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$\textit{Diamond}$

Diamonds are at the top of Friedrich Mohs scale of mineral hardness next comes topaz, quartz, feldspar, apatite, fluorite, calcite, gypsum.

They are incredibly hard because they have crystallized in a particular atomic shape that resulted from heat and pressure on Earth at a depth of 140 to 150km.

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