Fancy Brown Diamonds

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Brown Diamonds

brown diamondBrown diamonds are the most widespread of colored natural diamonds. For many years, brown was regarded as a less attractive color and most were allocated for industrial purposes. But technical progress and an increase in marketing efforts brown diamonds have grown in popularity as gemstones.

Brown diamonds compose a large part of Australia’s diamond production. The origin of the brown color is regarded as being a result of irradiation treatment, nickel impurities and lattice defects associated with plastic deformation. And this last reason is regarded as being the principal cause. However, a high-pressure high-temperature (HPHT) treatment has been created to repair lattice defects and convert brown diamonds into yellow or even colorless stones.

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