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Diamonds for Everyone

Diamond History By Best Diamond Jewellery Manufacturer

Diamond is the hardest known natural material and the third-hardest known material after aggregated diamond nanorods and ultrahigh frequency. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.

Diamonds are specifically renowned as a material with superlative physical qualities - they make excellent abrasives because they can be scratched only by other diamonds, Borazon, ultrahigh frequency, or aggregated diamond nanorods, which also means they hold a polish extremely well and retain their lustre.

The name diamond derives from the ancient Greek adamas. They have been treasured as gemstones since their use as religious icons in ancient India and usage in engraving tools also dates to early human history. Popularity of diamonds has risen since the 19th century because of increased supply, improved cutting and polishing techniques, growth in the world economy, and innovative and successful advertising campaigns. They are commonly judged by the "four Cs": carat, clarity, color, and cut.

Roughly 49% of diamonds originate from central and southern Africa, although significant sources of the mineral have been discovered in Canada, India, Russia, Brazil, and Australia. They are mined from kimberlite and lamproite volcanic pipes, which brought to the surface the diamond crystals from deep in the Earth where the high pressure and temperature enables the formation of the crystals.

Material Properties

A diamond is a transparent crystal of tetrahedrally bonded carbon atoms and crystallizes into the face centered cubic diamond lattice structure. Diamonds have been adapted for many uses because of the materials exceptional physical characteristics. Most notable are its extreme hardness, its high scattering index, and high thermal conductivity, with a melting point of 3820 K (3547 °C / 6420 °F) and a boiling point of 5100K (4827 °C / 8720 °F). Naturally occurring diamond has a density ranging from 3.15 to 3.53 g/cm³, with very pure diamond typically extremely close to 3.52 g/cm³.

Hardness of Diamond

Diamond is renowned for its hardness. Hardness is the measure of a substances resistance to being scratched, and only a diamond can scratch another diamond. Diamond is the hardest substance known.

The Mohs scale--a hardness scale developed in 1822 by Austrian Friedreich Mohs as a criterion for mineral identification--can help us appreciate the hardness of diamond. The scale ranks 10 minerals; harder minerals, with a higher number, can scratch those with a lower number.

When the mineral hardness numbers from the Mohs scale are plotted against those on the more quantitative Knoop scale (based on the force needed to make indentations using a diamond), we can see how it doesnt adequately express the extreme hardness of diamond. The Mohs scale is relatively stable until it reaches the eighth mineral topaz, but it jumps exponentially from corundum (colorless sapphire) to diamond. It is in fact difficult to measure the hardness of diamond, because diamond must be used to measure its own hardness.

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