Rare and valuable minerals

What color is the most expensive diamond in the world?

There are very few people in the world who understand diamonds, and even fewer who know a lot about colored stones. Unscrupulous traders take advantage of this when they sell a “unique” champagne or cognac colored stone to an unprepared consumer for 10-20 times more than its real value. We’ll tell you about the main principles for choosing colored stones that will help you avoid being deceived.

What colors do diamonds have?

All diamonds can be divided into two large categories – colorless and colored. Diamonds, the raw material for diamonds, were created by nature millions of years ago. This is a product of crystallization of carbon molecules under high pressure and exposure to enormous temperature. During the process of crystallization, the stone could, figuratively speaking, “catch” various impurities and become colored. Colored diamonds are found in nature much less frequently than colorless diamonds. Only 0,01% of diamonds in nature are “fancy”, that is, colored. The undisputed leader in uniqueness, rarity and price among colored diamonds is red. The auction price for such a diamond starts at $1 million per carat. The largest diamond, a rare red color, weighs just over five carats. The presence of red color in a diamond is due to deformations in its crystal lattice caused by high pressure during the natural formation of a diamond. Next is the green fancy diamond. A diamond receives this color as a result of natural radioactive radiation that has penetrated deep into the diamond. The blue color in a diamond is indicated by the presence of the chemical element boron. What makes a diamond orange and yellow is when it enters the crystal lattice of the chemical element nitrogen.

What determines the color of the stone

The color of a diamond is determined by its structure and the presence of impurities in the crystal lattice. Yellowish and brownish diamonds are predominantly mined – with a decrease in intensity until there is no color. The yellowish, greenish color is due to nitrogen. Bright yellow and brown stones are obtained if nitrogen is unevenly distributed and its concentration is low. The blue color of the stone is caused by boron impurities. This crystal conducts electricity. The green gem is a diamond with impurities of thorium and uranium. Diamonds come in different colors Pink is the rarest stone in nature. This color is due to the formation of the crystal under very high heat, causing lattice deformation without the presence of impurities. Black is a stone with graphite inclusions. The more impurities, the less transparent the crystal; At the same time, a metal-like shine appears.

Color rating

All over the world, diamonds are graded using the GIA (Gemological Institute of America) international system. This system was developed in the early 1950s by the Goths. and is an industry standard. The scale begins with D, representing colorless stones, and continues to Z. Each element on the scale has a clearly defined color characteristic. Characteristic D is the most expensive, E and F are slightly cheaper, all other things being equal. Many of these color differences are so subtle that they are not noticeable to the untrained eye. But these small differences in shades have a big impact on the final grade and cost of the gemstone. The assessment is made by comparison with standards under special conditions and under a certain light in a gemological laboratory. Existing instruments cannot measure the shade of a diamond with sufficient accuracy and a high degree of objectivity. Objective photometric measurements using special instruments are critically influenced by factors such as proportions, luminescence, transparency, slight greenish, brownish and grayish tints, and the presence of large colored inclusions. Experience shows that the best method for assessing the color of diamonds is by comparing them with reference samples. Standards are stones that meet the following criteria: round cut, weight 0.4 carats for evaluating specimens up to 1 ct; for larger diamonds, it is better to use standards of greater weight. Samples must be transparent, must not have strong visible internal defects, crystals that affect the shade must be clean. It also does not have fluorescence, but has a thin, even girdle. Most gemologists are able to determine color by eye, without comparison with samples. This requires constant practice and a lot of “watching” of the stones. It is difficult to make an accurate examination of the product due to the presence and influence of metal. In practice, color assessment is performed under a cold fluorescent light lamp on a sheet of special white calibrated paper, folded at approximately 45 degrees. The stones are thoroughly cleaned with a soft cloth, after which the specialist appraiser is laid out with the platform down on the horizontal surface of the paper, at a distance of about 1 cm from each other. The appraiser looks at the top part, the culet, where the color of the diamond is most concentrated. He compares it with the standard that lies nearby. There is a way to compare samples of different sizes. The difference in size makes comparison difficult, as larger stones exhibit clearly greater saturation. An inexperienced appraiser may mistakenly classify them into a lower group. In this case, it is recommended to compare samples exclusively based on the upper part of the pavilion. It is also recommended to breathe on the stone, thereby reducing the reflection effect.

Russian scale

  • a white, bluish tint is faintly noticeable;
  • faint yellow tint;
  • a yellow or white gem with a pronounced color tint;
  • brown.

Minerals with 7 facets, not exceeding a mass of 57 ct, are divided into 0,299 groups:

  • 1 – the mineral is white, the bluish tint is faintly noticeable;
  • 2-3 – a faint light yellow reflection is noted;
  • 4 – white specimen with a noticeable color tone;
  • 5 – yellow;
  • 6-7 – brown minerals.

57-carat minerals weighing more than 0,3 ct are divided into 9 categories:

  • 1 – white-blue;
  • 2-3 – shade barely perceptible to the eye;
  • 4-5 – slightly noticeable yellowness;
  • 6-7 – presence of clearly visible color;
  • 8 – yellow;
  • 9 – brown.

Minerals are not compared with a standard. Their appearance is assessed by verbal description. The concepts are very vague.

Which color is better?

The GIA rating scale is divided into main categories. DEF are completely colorless stones. GHIJ – white. KLM – with a slight tint (often stones of these colors do not look yellowish, you need to look at a specific specimen). NOPQR – with light color. STUVWXYZ – with a clear color, visible to the naked eye. The last group is not yet considered fancy, although it has a clear color. All rare colors, for example blue, violet, with any color intensity, are assessed by saturation. It includes the following characteristics, which follow in order of intensity: light, Fancy, Intence, Vivid, Deep.

Color or clarity: which to prefer?

This is probably the main thing that worries you when buying jewelry. There is no clear answer to this question. In fact, everything is important.

Diamonds of perfect purity are rare and, accordingly, they are expensive. It is impossible to distinguish cleanliness from the first to the seventh class according to GOST or up to SI2 according to GIA without a tenfold magnification.

The rest depends on the framing of the stone. If you already have a frame, then the main thing is not to make a mistake with the color; the frame should emphasize the shine. The purity of the stone is highlighted by the gold frame. So the choice of stone always depends on specific conditions.

When choosing a fantasy specimen, color is more important than all other characteristics.

How colored stones vary in price

Pricing fancy colored diamonds is quite a complex task. Understanding colors and, accordingly, not getting into trouble when haggling with the seller, although not easy, is quite possible. Before purchasing, you should seriously study the offers on the current market in order to navigate the prices. The fact is that, unlike colorless diamonds, there is no single Rapaport Diamond Report price list for colored diamonds. Colored fancy diamonds have a separate grading system and their own market.

The main thing you need to know is that any stone you buy must have a GIA (Gemological Institute of America) certificate. This is the only independent laboratory in the world whose expert analysis is recognized by jewelers around the world as a standard and will not be challenged. Any other certificate in our environment is considered simply a piece of paper printed on a printer. Accordingly, a stone without a GIA certificate may actually have completely different characteristics than the seller in the jewelry store tells you. But even if a colored stone has a GIA certificate, only a professional can evaluate the color saturation.

Colored stones have many gradations of color, so I strongly recommend choosing a stone with an expert (usually his services cost from 1% to 3% of the price of the stone). If you do decide to do it yourself, I can give you some general guidelines to help you figure out the color.

In addition to the four main criteria for grading a diamond (weight, shape, color and clarity), colored diamonds have an additional classification related to the color of the stone. The most important criterion for evaluating a colored diamond is the intensity of its primary color, and also the additional shades of the stone available. There are nine primary diamond colors: red, green, purple, blue, pink, orange, yellow, gray and brown. Each diamond color has nine levels of intensity. The main ones: faint (insignificant), light (weak), fancy light (weak fantasy), fancy (fantasy), fancy intense (intensive fantasy), fancy deep (rich fantasy), fancy vivid (bright fantasy) .The value of a fancy diamond increases dramatically as the color intensity increases. The truly most expensive and rare fancy colored diamonds are those with fancy vivid color intensity, followed by fancy intense stones.

Secondly, you need to remember: stones of pure colors (red, green, blue, pink, orange, yellow) are more expensive than stones with an admixture of an additional shade. When a stone is not uniform in color, it is said to have an additional secondary color tint, or overtone. Such diamonds are significantly cheaper than pure colored ones. In other words, a stone with a primary color of fancy yellow and a secondary secondary shade of brown will be recorded on the GIA certificate as Fancy Brownish Yellow. Thanks to this form of entry in the certificate, you can understand that the main color of the diamond is yellow. A diamond marked “Fancy Brownish Yellow” in the certificate costs two or more times less than a stone of “Fancy Yellow” color. In general, the appearance of any additional minor shade in a stone, especially brown, reduces the cost of a diamond several times. That is why “champagne” or “cognac” colored stones, which through the efforts of sellers are now becoming popular in Russia, are actually inexpensive diamonds of impure colors.

In addition, the diamond must have no fluorescence (the property of glowing in ultraviolet light). A stone with fluorescence is 15-30% cheaper. Next, look at the certificate for the quality of the stone cut. It should be either Very good or Excellent. This cut gives a beautiful play of light.

The color of the stone must be natural. The fact is that now there are several technologies for changing the color of a stone. The GIA certificate will necessarily indicate whether the stone has been artificially processed. For a natural diamond, Natural will be indicated in the Color Origin column on the certificate. If the stone has been treated, then you will see the entry Treated (treated) or, for example, HTHP (high temperature and high pressure treatment method). This is especially important if you are buying a stone from Russia, where about 80% of colored diamonds have actually been treated this way. And it reduces the cost of the stone tens of times. For example, a one-carat pink artificial diamond can cost around $4000. And the same natural-colored stone costs $600-000!

How to choose the best diamond color and clarity?

It seems quite simple to determine the best diamond color and clarity – you can easily see which grades are at the top of the grading scale. However, these highly graded stones are also the most expensive.

It’s more difficult to choose the best color and clarity that will also be the cheapest. Let’s see how you can do this.

When purchasing diamonds, we recommend that you first ensure that the stone is visually clean, meaning that it does not have any flaws large enough to be visible to the naked eye.

Diamond color, best to buy.

As you can see from the rating scale, color D is the best. However, diamonds that are completely colorless are very rare and expensive (many stores simply don’t carry them).

If you are sure that you want a diamond that is in the colorless range, you can choose the F color – this is the cheapest colorless grade, and the difference between it and the D color will not be visible to the naked eye.

If you want to pay as little as possible for a diamond that still appears colorless, look at stones in the near colorless range.

G and H look quite white, and the only time you will be able to tell the difference between them and a colorless diamond is if you place them next to each other, and even then the difference will be small.

Don’t choose a color below H, I or J if you are going to set your round diamond in a white metal such as platinum, which can cause any yellow tones to stand out. For cuts other than round, grade G or H is a good choice, but no lower than I.

On the other hand, if your setting is going to be gold, you can safely choose a stone graded I, J or even K and it will still look white on a yellow background.

If you’re shopping for a round diamond for a yellow gold setting, you can safely choose a stone with a color graded as low as J, K or L (sometimes even M) and not have to worry about the visibility of its yellow hues when it’s set.

For other diamond cuts, you may need a higher grade such as I, J or K.

Clean, best for purchase.

The most important question when it comes to clarity is whether to pay extra for a flawless or internally flawless diamond.

In reality, VS2 or SI1 diamonds are not much different when worn.

You don’t necessarily need to look for the highest clarity stone, as VS1-VS2, or SI1 grade diamonds can appear as clear as FL/IF if you take the time to find a good, beautiful diamond.

It is true that the flaws in such stones are larger and more numerous than in FL or IF diamonds, but this difference is more noticeable with a microscope than with the naked eye.

So if you want to get the most bang for your buck and buy a diamond with good clarity, take a look at stones graded VS2 or SI1 and choose one that looks clear to the naked eye.

You can also look at SI2 diamonds – they may have some visible inclusions, but these are more likely to be located on the edges of the stone, and if you set it in a setting that hides the periphery of the diamond, then these imperfections will not be visible.

Overall, to save as much money as possible and get a diamond that appears colorless and clear, focus on stones with H color and SI1 clarity. If the setting is made of yellow gold, you can buy a J- or K-color stone, and if the setting only shows the top of the diamond (as is the case with a full bezel setting, for example), you can even buy an SI2 clarity stone.

How and why to buy a colored diamond?

Is it worth the risk when choosing a colored diamond? You must answer this question for yourself. Let me clarify that colored diamonds grow in price the fastest. In the near future we can expect a significant increase in prices for such stones. The fact is that over the past 15 years, the production of colored diamonds has decreased greatly. That is why they are interesting from an investment point of view. For example, the price of pink diamonds has increased the fastest – by 385% over the past 10 years. They are followed by fancy yellow diamonds at 322% over the same period. The cost of orange and green diamonds increased by 276% and 230% respectively. The cost of blue diamonds also grew slowly but steadily – by 183% over 10 years. But colorless diamonds have increased in price by 10% over 72 years. It is likely that the situation may repeat itself in the next decade.

How, then, to purchase a colored stone correctly? Firstly, it is strongly recommended to leave Russia and go to one of the diamond capitals of the world – for example Tel Aviv, Hong Kong, Antwerp or Mumbai. The fact is that in Russia most stones are sold without a GIA certificate, which allows stores to inflate the characteristics of the stone and, accordingly, the price several times. Already on the spot, it will not be difficult for you to find a reliable broker who will present you with a choice of several stones with a GIA certificate and provide expert support during the purchase process.

Colored stones with pure colors and good characteristics can make a wonderful gift and an excellent tool for preserving wealth. The main thing is to be aware of all possible dangers and carefully study the market offers.

      • https://www.forbes.ru/mneniya/idei/330077-tsvetnye-brillianty-investitsii-v-krasotu
      • https://cherish-centr.ru/proby/cvet-brillianta.html
      • https://BrilliantSky.ru/ocenka-brilliantov/cvet-brillianta/
      • https://MoiKamni.info/drugoe/chistota-brillianta

      Why are regular 6/7 yellow diamonds considered low quality diamonds while other yellow diamonds are priced at the highest price? Let’s figure it out.

      Natural fancy colored diamonds have come to be called colored diamonds.

      These diamonds include:

      yellow, cognac, pink, blue, red, purple and green diamonds.

      Blue diamond “Wittelsbach-Graff” – $80 million

      Where does this color come from?

      The presence of color is due to various impurities and their inclusion in the diamond crystal lattice.

      Cognac color – contains iron.

      Yellow – this is lithium, diamonds of this color are one of the most inexpensive colored diamonds, they are more common than others, the cost is comparable to ordinary diamonds in stores.

      Orange diamond, 14.8 ct, sold for $35.5 million

      Green – due to an admixture of chromium, such diamonds are rare. They can be found either in museums or from exclusive private collectors.

      pink and red color – characteristic of diamonds with an admixture of manganese. Red diamonds are the most expensive diamonds in the world.

      Rio Tinto red diamond collection

      In 2013, a 60-carat red diamond was auctioned by Sotheby’s for $80 million, which is not the highest price for red diamonds.

      Purple color Diamonds are also rare. Recently there was a rumor that a purple diamond was found in Australia. The stone gets this color due to the admixture of hydrogen.

      Black diamonds – do not apply to colored diamonds. Until recently, they were rejected for ore, being considered “substandard” by jewelers. However, twenty years ago, the Italian jewelry house De Grisigono changed the fashion for black diamonds and began making jewelry in a combination of white and black diamonds. Thanks to this marketing, the price of black diamonds has increased tenfold.

      Characteristics of COLOR Diamonds:

      A variety of colored diamonds and their fancy cut shapes.

      1. Hardness– the highest, like white diamonds: 10 on the Mohs scale.
      2. Colorvaries on a scale from 1 to 10. In this case, 1 is the brightest and most saturated color of a colored diamond. The higher the color number, the lower the cost and value of such a stone.
      3. Purity. Cleanliness is key. It is because of this characteristic that some fancy diamonds cost millions, while others are quite inexpensive. The purity scale is from 1 to 10. The closer to 1, the higher the price and quality.

      This is especially true for ordinary diamonds in our jewelry stores. Diamonds with characteristics of 5/6, 6/6, 6/7 and more are often found (the second number indicates the purity of the stone). These are ordinary white diamonds with a large number of inclusions, already visible to the naked eye. The color of such stones is already turning yellow, but the quality is low. And these are NOT fancy yellow diamonds, no matter what the seller tells you.

      In addition to rich, bright color, expensive colored diamonds also have a minimal number of inclusions and high transparency.

      Over the past 2 decades, the fashion for colored diamonds has grown.

      For example, in 2002, Ben Affleck gave Jennifer Lopez a $1 million engagement ring with a 6-carat pink diamond.

      Jennifer Lopez with a white gold ring with a pink diamond, $1,2 million

      There are few fancy diamonds; they are often cut by global jewelry brands.

      Jewelry with colored diamonds is incredibly beautiful, because in terms of brilliance and sparkle they are not inferior to ordinary white diamonds!

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