INDIAN GEOGRAPHY

MINERAL AND ENERGY RESOURCES IN INDIA

MINERALS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is the hardest mineral?
A
Diamond
B
Granite
C
Basalt
D
Gabbro
Explanation: 

Detailed explanation-1: -The hardness of any mineral is defined by the Mohs scale. Diamond is the hardest known natural mineral according to Mohs scale. Diamond hardness depends on its purity and the hardest diamond can only be scratched by other diamonds.

Detailed explanation-2: -Diamond is the hardest known mineral, Mohs’ 10.

Detailed explanation-3: -The structure extends in space and produces a rigid 3-D network of carbon atoms with directional covalent bonds throughout the lattice. It is very difficult to break extended covalent bonding which makes diamond the hardest substance on the earth.

Detailed explanation-4: -Lonsdaleite was found in a meteorite that scientists say came from a dwarf planet that was billions of years old. An asteroid crashed into that planet, releasing pressure that caused the stone to form. The hardness of lonsdaleite could be useful in making super durable tools for industrial sites.

Detailed explanation-5: -Lonsdaleite is also an allotrope of a carbon atom which is considered a 58% harder material than the diamond because of the enhancement of bone density per unit area and it has a hexagonal geometry. Boron nitride and Silicon carbide are the two other synthesized materials which are approx.

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