Most other diamonds show more evidence of multiple growth stages, which produce inclusions, flaws and defect planes in the crystal lattice all of which affect their hardness (Taylor et al. Industrial use of diamonds has historically been associated with their hardness; this property makes diamond the ideal material for cutting and grinding tools.It is one of the most known and most useful of more than 3,000 known minerals.
Because it can only be scratched by other diamonds, it maintains its polish extremely well, keeping its luster over long periods of time.
Unlike many other gems, it is well-suited to daily wear because of its resistance to scratchingperhaps contributing to its popularity as the preferred gem in an engagement ring or wedding ring, which are often worn everyday.
is one of the two best known forms (or allotropes) of carbon, whose hardness and high dispersion of light make it useful for industrial applications and jewelry (the other equally well known allotrope is graphite).
Diamonds are specifically renowned as a mineral with superlative physical qualities - they make excellent abrasives because they can only be scratched by other diamonds, which also means they hold a polish extremely well and retain luster.
These diamonds are generally small, perfect to semiperfect octahedra and are used to polish other diamonds.
Their hardness is considered to be a product of the crystal growth form, which is single stage growth crystal.
As with any material, the macroscopic geometry of a diamond contributes to its resistance to breakage.
Diamonds cut into certain particular shapes are therefore more prone to breakage than others.
However, aggregated diamond nanorods, an allotrope of carbon first synthesized in 2005, are now believed to be even harder than diamond.
The hardest diamonds in the world are diamonds from the New England area in New South Wales, Australia.
They are generally mined from volcanic pipes, which are deep in the Earth where the high pressure and temperature enables the formation of the crystals.