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There is apparently a high-pressure, high heat process that can alter a brown diamond's colour. This treatment can 'heal' lattice defects that cause the brown colour.
Note, however, that treated diamonds are less valuable that natural diamonds. A GIA certified gemologist will always be able to tell that a diamond has been treated.
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Which treatment can remove some or all color from certain types of light brown diamonds?

High-pressure, high-temperature (HPHT) treatment can remove color from some light brown diamonds by enhancing the diamond's clarity and color, making it appear whiter. This treatment can reduce the brown hue by changing the diamond's crystal lattice structure. However, the success of this treatment can vary depending on the specific diamond.


Where are brown diamonds mined?

Australia produces brown diamonds from their mines.


Are chocolate diamonds natural or manufactured?

'Chocolate diamonds' are named thus because this shade of brown diamond is the colour of chocolate. Some brown diamonds are natural diamonds; some brown diamonds are manufactured diamonds. A gemologist will help you determine the source of your brown diamond. Manufactured diamonds are always less expensive than natural diamonds with similar characteristics.


What metals do diamonds have in them?

Diamonds are formed from carbon. Some brown diamonds may contain trace amounts of nickel -- otherwise diamonds do not contain metals.


What are brown diamonds?

Brown diamonds are the most common colour of diamonds mined, of gem-quality. Only about 20% of all diamonds mined are of gem quality.


What do chocolate diamonds look like?

Faceted, finished brown diamonds are simply diamonds within that colour range. Chocolate diamonds are an intense brown colour.


Is chocolate diamonds man made?

Brown diamonds are the most common of coloured diamonds found. Chocolate is simply the name of one of the shades of natural brown diamonds. Lab-created diamonds are generally 'white' diamonds.


Are chocolate diamonds the same as regular diamonds?

No, chocolate diamonds are a marketing term used by Le Vian to describe brown diamonds. They are still real diamonds but have a distinct brown color due to the presence of nitrogen impurities. Regular diamonds can come in a variety of colors but are most commonly white or colorless.


Are chocolate diamonds brown in color?

Yes, every shade of brown that you can imagine is available in the different colours of brown diamonds, including chocolate.


What are cocoa Diamonds?

Cocoa diamonds are probably a shade of brown diamond.


Are chocolate diamonds made from actual chocolate?

No, they are diamonds. They are called chocolate diamonds because of their brown color.


Where do brown diamonds come from?

Brown diamonds come from the earth just like all other diamonds. Brown diamonds come from every mine in the world, and the most profitable mine that produces them is called the Argyle mine in Australia. Notable brown diamonds, however have come from Brazil and from Africa.