What color diamond is the rarest?

Basically, when we hear the word “diamond,” we imagine a colorless, iridescent stone. But it’s no secret that colored diamonds are also found in nature, although not so often. They come in almost every color from yellow to blue. The blue diamond is recognized as the rarest.

Blue diamonds are colored diamonds that have a rare blue hue of varying saturation. The most famous “French Blue Diamond” (later the “Hope” blue diamond) weighing 42,52 carats is currently kept in the Smithsonian Institution museum complex in the US capital.
Purple, blue, green, and red diamonds differ significantly in cost from transparent ones. Since colored diamonds are much less common in nature, they are naturally more expensive. Therefore, only a select few can afford such diamonds. There are not many companies in the world that deal with colored diamonds. Sometimes the price of a fancy colored stone reaches one million dollars per carat. Not a bad gift! Moreover, if a colored stone has a tint, that is, its color is not pristine, then the price can be significantly lower or, conversely, higher. For example, if a pink or red diamond has a subtle shade of brown, then the value of that stone will decrease.

The Diamond Fund in the Kremlin exhibits two fancy diamonds: a blue one weighing 7 carats and a pink one weighing 3.36 carats, as well as several yellow and brown diamonds. Diamonds in colors such as red, pink, orange, purple, blue, blue, and green are often more expensive than colorless diamonds of the highest color group. The high cost makes such stones available exclusively to a narrow circle of very wealthy buyers. It is therefore not surprising that there are only a few companies worldwide that specialize in fancy colored diamonds. In 2003, the Smithsonian Institute of Natural History in the USA demonstrated a unique exhibition of fancy diamonds, for which stones had to be borrowed one by one from the collections of major companies.
But with a stone whose natural color is brown, everything is exactly the opposite; if a slight shade of orange is noticed, its price makes a huge jump up. An unacceptable shade for blue and blue stones is gray. Green diamonds with a yellow tint will also cost significantly less.

The pink diamond, like other rare colored diamonds, is almost always offered to buyers at auctions in Switzerland. The exceptional rarity of such precious stones and their “feminine” pink hue have always attracted the attention of society ladies who are knowledgeable about jewelry.
The fashion for colored diamonds fluctuates constantly, with different colors of diamonds being popular in each era. For example, in the 19th and early 20th centuries, blue diamonds were considered the most fashionable. Interestingly, the most expensive and therefore the most famous blue diamond in the world is called the 42.5-carat “Hope”, which is translated from English as “hope”. This stone is valued at $200 million.

It is no secret that a pink diamond costs on average $150,000 per carat, which elevates a ring or pendant with such a stone to a luxury product. Note that a pink diamond rarely weighs more than 2,0 carats; therefore, an elegant ring or pendant is perfect for such an insert. Source: http://almazzz.com/cvetnie_brillianti.html
Other answers
Scarlet (red) [link blocked by decision of the project administration] London’s Natural History Museum will show rare white and colored diamonds at the Diamonds exhibition, which will last from July 8, 2005 to February 26, 2006. The highlight of this world’s largest diamond exhibition is the 230-carat De Beers Millennium Star, one of the most famous diamonds in the world. This is a white, pear-shaped, flawless stone that has no price, which 5 years ago they unsuccessfully tried to steal from a diamond collection exhibition at the Millennium Dome in London. According to a museum representative, thieves will have no chance at the future exhibition, since the latest security systems will be used to protect the collection. The Millennium Star diamond was mined in the early 1990s in the Democratic Republic of Congo. Its cutting using laser technology took more than three years. The exhibition will also showcase:
Steinmetz Pink. The world’s largest fancy hot pink flawless diamond weighing 59.60 carats, oval cut. Its processing took two years; it was first shown in May 2003 in Monaco by model Helena Christensen.
Incomparable. The yellow diamond weighing 407.48 carats is the third heaviest in the world. It was cut from a rough diamond weighing 890 carats.
Ocean Dream. The world’s largest natural deep fancy blue-green diamond weighing 5.51 carats. Its stunning color – the result of exposure to natural radiation over millions of years deep within the Earth – makes it one of the rarest diamonds.
Moussaieff Red. The discovery of such a large – 5.11 ct – deep red diamond is an amazing success, since there are very few real red diamonds in the world; it is one of the rarest and most expensive diamonds in the world.
Heart of Eternity. An extremely rare diamond with exceptional light tone and deep, rich color. It is classified as a fancy royal blue, weighs 27.64 ct, and has a heart cut. This is one of the most beautiful blue diamonds in the world.
Allnutt. The 101.29 carat, brilliant yellow, cushion cut diamond is one of the most astounding diamonds in the world. 616. Diamond crystal weighing 616 carats; it is left uncut, just as it was found. It is now the world’s largest single diamond crystal, both rough and cut. All these exclusive stones are being exhibited together for the first time. New York collectors Alan Bronstein and Harry Rodman put on display (for the first time in Europe) the Aurora Collection, a set of 296 naturally colored diamonds weighing a total of 267.45 carats. This collection of exceptionally rare stones includes examples of 12 color varieties and displays a stunning spectrum from emerald green to blood red. Information about the exhibition:
Admission: £9, Family Admission: £24 (up to five people including at least one adult), NHM Members, Patrons and children under 5 years free
Display location: Natural History Museum
Opening hours: Monday–Saturday 10.00–17.50, Sunday 11.00–17.50
Answers to visitor questions: Monday–Friday 020 7942 5000, Saturday and Sunday 020 7942 5011.
Website: [link blocked by decision of the project administration]. Having decided to buy diamond jewelry, many of us spend a lot of time and effort searching for a suitable item that combines price and quality parameters, forgetting about the most important aspect – the color of the stone itself. Jewelry news is often full of reports about colored diamonds sold at auction. However, not all of us know for certain what colors these mysterious and very beautiful stones come in. Colored diamonds belong to a special group of precious stones. The color of a diamond is determined by visual assessment; sometimes special lamps are used, which have a special color section and color temperature. Today you can find diamonds of absolutely different shades – reddish, pink, blue, purple, yellow, green, etc. Very often in nature there are samples that have all shades of yellow, which are included in the same group with transparent diamonds. An ideal stone is considered to be a completely transparent diamond crystal that has no color and is classified as category D according to the international grading system. The color is determined by the amount and composition of impurities. At the same time, there is a fairly large range of various shades, starting from dark brown and ending with completely transparent, there may also be shades that start from pale yellow and end with green-yellow. This color depends on the amount of nitrogen, which is unevenly distributed throughout the crystal. This type of diamond usually comes in a rich yellow or brown hue. Stones with a blue hue depend on the number of boron atoms. Such diamonds are capable of conducting electricity through themselves. The green tint is determined by the presence of radioactive uranium or thorium in its composition. The rarest diamonds in nature are those of a pink hue, which smoothly turns into brown. What is most interesting is that black or Carbonado diamonds are quite common. But they practically cannot be cut, since they contain microscopic black graphite plates. Due to the high graphite content, the stone has a metallic luster, which makes it almost opaque.

Natural diamonds acquire color in different ways

So impurities can change the color of the stone. For example, nitrogen impurities give the stone a yellowish tint. If radiation is present during the creation of a diamond, green-hued diamonds appear. Today, gemologists are able to create colored diamonds by skillfully changing the hue of the diamonds. Radiation and high-temperature diamond processing can transform brownish and yellowish diamonds into beautiful gemstones with vibrant, rich colors. However, natural colored diamonds are quite rare in nature and, accordingly, have a very high cost. Various manipulations with diamonds make it possible to obtain more affordable colored diamonds. If you do not know how to distinguish a natural colored diamond from an artificial one, be sure to ask for a certificate certifying its natural origin.

Popular colors

The most common natural diamonds are pink, blue, yellow, brown, green, orange and red. They are generally smaller and used for stylish jewelry. Yellow diamonds are the most common, while red, blue and green diamonds are very rare. Don’t make a mistake in your choice! Each colored diamond is a completely unique work of nature, skillfully revealed to the world by the skill of a jeweler-cutter. The color of such diamonds is called fantasy – after all, only in the wildest fantasies can one imagine all the variety of colors that nature gives to the kings of precious stones When talking about diamonds, it is customary to extol their purity and sparkling icy light. The reference stones are called colorless, they are compared to the clear coolness of mountain spring water. Such stones are very valuable and are extremely rare in nature. But there are other rarities among diamonds – stones to which nature gave one of the colors of the rainbow, turning them into a sparkling hymn to beauty. Fancy diamonds aren’t just beautiful; Their ability to play with light is in no way inferior to colorless diamonds, but they have individuality and are remembered immediately and forever. It is not for nothing that in ancient times they were owned only by royalty. Today, true connoisseurs of beauty include colored diamonds in exquisite collections. Any colored diamond, regardless of size and shade, is unique in the tones and shades of its color, the degree of its saturation, and its brightness. Out of a thousand diamonds, only one has a deep natural color.