Diamonds come in a variety of colours, including yellow, brown, red, purple, blue, and green. Natural or synthetic colours can be used.
Natural fancy colour diamonds are coloured in a variety of ways. The hue is caused by trace components in the stones, such as nitrogen, which results in a yellow diamond.
The diamond could have been subjected to radiation during its formation; green diamonds are an example of jewels that have been damaged by radiation.
In a fancy colour diamond, inclusions that would be considered undesirable in a colourless stone often contribute unique tones and fascinating flashes of colour.
The inherent hue of a diamond can be enhanced or changed.
Fancy colour diamonds are growing more popular, so gemologists have devised techniques to make them more inexpensive by transforming brownish and yellow diamonds into colourful show-stoppers using heat and radiation.
Because most natural coloured diamonds are uncommon and expensive, treatments allow more people to own these vibrant diamonds.
Any reasonably priced fancy colour diamond should be assumed to have been treated in some way.
If you have any doubts about a stone's origins, request a lab certificate to confirm its validity. If a coloured diamond is sold for a low price, the colour is almost certainly synthetic.
Coatings are sometimes used by unscrupulous vendors to hide or enhance a diamond's real hue.
Wear or cleaning solutions can remove these coatings. Brown and yellow diamonds are converted into exotic hues such as green, brilliant yellows, blues, purples, reds, and other colours using irradiation and high heat treatment.
This colour change is normally permanent, but if excessive heat is used when fixing repairs, it may be altered.
HPHT was first used to transform low-cost yellowish diamonds into beautiful coloured gemstones, but it is now also utilised to transform them into absolutely colourless diamonds that can be sold for a much greater price.
Some companies argue that HPHT isn't an artificial treatment at all, but rather a procedure that completes what nature began.
Diamonds are undoubtedly subjected to such an environment on the surface of the planet, and when the process is replicated in a man-made setting, it is difficult to discern by visual inspection.
When HTPT treatments are identified, GIA grading reports now state “HPHT Annealed” or “Artificially Irradiated” in the Origins section of the report.
Any diamonds that have been exposed to HPHT must be labelled as such, according to the FTC.
Colored synthetic diamonds are also available. These are chemically identical to genuine diamonds, however, they are manufactured in a laboratory.
The secret to creating diamonds was found in the 1950s when Swedish and American researchers synthesised diamonds practically simultaneously.
This method necessitated pressures of over 55,000 atmospheres and temperatures of 1400°C, as well as molten iron to convert graphite to diamond.
Currently, General Electric and De Beers generate about 80 tonnes of synthetic diamonds per year, largely for industrial purposes.
Some businesses, however, are developing high-grade synthetic diamonds, making ownership of a fancy colour diamond a reality for purchasers who would otherwise be unable to afford a natural stone.
The price of coloured diamonds is influenced by a number of factors. The diamond will cost more if the colour is uncommon and vivid.
In contrast to white diamonds, the presence or absence of inclusions is only a minor factor.
Coloured diamonds have their own grading system, which is divided into nine categories by the GIA: Very Light, Light, Fancy Light, Fancy, Fancy Dark, Fancy Intense, Fancy Deep, and Fancy Vivid.
The most common diamonds are yellow and brownish; the rarest and most costly are blue, green, and notably red.
Though public tastes may alter in the future, yellow and pink diamonds are the most popular.
Jennifer Lopez wore a huge pink diamond ring, which boosted pink diamond sales.
Celebrity preferences have a significant impact on luxury product trends.
Champagne diamonds, which are yellow and brown diamonds that are less expensive than white diamonds, are frequently referred to as Champagne diamonds.
Champagne diamonds with a secondary pink hue are a popular choice. When these stones are held up to the light, they show bright bursts of pink in their fire.
These stones come in a variety of champagne tones, ranging from mild champagne to fine cognac.
A very pale yellow diamond will be classified in the X to Z colour range, making it more like a low-end white diamond than a fancy colour diamond.
High-intensity yellow diamonds, such as vivid or deep, are extremely rare and therefore more valuable.
Natural fancy pink diamonds are extremely rare, accounting for only a fraction of one per cent of the Argyle mine's output.
Pink diamonds from India, Brazil, and Africa are often softer in colour than Argyle diamonds, which are highly pink.
Pink, Purplish pink, Brownish pink, Orangey pink, and Pink Champagne are the five colour groups for these gems.
Pink diamonds with no secondary tint are the most valuable and rarest of all.
The Argyle mine in Western Australia's Kimberley region is the world's largest diamond supplier by volume.
It is also the world's leading producer of brightly coloured pink diamonds, accounting for 95% of global production.
Pink hue diamonds, on the other hand, make up a very small percentage of Argyle diamond production, less than one-tenth of one per cent.
Over the last decade, Argyle's pink diamonds have gained in popularity. A 3.14 carat Argyle pink sold for $1,510,000.00 at a Christie's auction in New York in 1989. Argyle has sold pink diamonds for up to $1 million per carat privately.
The Argyle mine, which is also known for producing brownish diamonds that were previously unpopular with consumers, was the first to use the terms champagne and cognac in a marketing push to urge consumers to appreciate these stones.
Brown diamonds are growing more expensive as they are used more frequently in jewellery, and this strategy appears to have worked.
The final price of a stone is affected by clarity, colour dispersion, and cut within a specific grade.
Smaller diamonds (less than 0.80 carats) can cost tens of thousands of dollars less than larger, rarer jewels.
The cost of exceptionally well-cut stones and stones with a VVS or IF clarity might range from 10% to 20% higher. Brownish-yellow, for example, is a secondary hue that saves money.
An excellent cut gives a fancy diamond its radiance and aids in bringing out the most vibrant hue.
To maximise light refraction, white diamonds are cut in a regular fashion. When cutting coloured diamonds, however, the cutter frequently takes into account the inclusions in the stone, which can enhance the diamond's colour.
A diamond's colour is also determined by its facets and angles, so the cutter must decide which form would best bring out the gemstone's best colour.
“Direct from the mine” wholesalers, or merchants that acquire rough stone or newly cut diamonds straight from the source, give the best pricing.
Although not all wholesalers sell to private purchasers, those who do can save their customers a lot of money.
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