GEOLOGY

Detailed explanation-1: -Diamond sits at the top of the Mohs scale of hardness at number 10 as the hardest material. The Mohs scale rates relative hardness among materials. But hardness is non-linear and it is calculated that diamond is many times harder than next hardest substance (corundum) at 9.

Detailed explanation-2: -Hexagonal diamonds, also known as Lonsdaleite diamonds, are a special type of diamond with carbon atoms arranged in a hexagonal pattern. Formed when graphite is exposed to extreme heat and stress, such as at meteor impact sites, the rare material has long been theorized to be stronger than ordinary cubic diamonds.

Detailed explanation-3: -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-4: -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-5: -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.