Rare, colorful, valuable:
Fancy color diamonds are an extraordinary phenomenon in the world of gemstones. For every 10,000 or so colorless diamonds, only 1 diamond with this color predicate is obtained. In many cases, their prices exceed those of colorless diamonds.
The yellow coloration is caused by the additional incorporation of nitrogen atoms into the diamond's crystal lattice. Nitrogen absorbs the violet and blue portions of the light spectrum, causing the stone to appear in the complementary color yellow. Depending on the amount of nitrogen incorporated, the intensity of the yellow varies. Yellow diamonds with particularly intense coloration are referred to as 'Canary Yellow.' Such intense colors (like 'intense' or 'vivid') are extremely rare and therefore very valuable.
The most common overtones in yellow diamonds are green, orange, and brown.
1. South Africa: Particularly well known for its diamond mines, including the famous Kimberley mine, from which many yellow diamonds originate.
2. Botswana: Another major producer of diamonds, including yellow varieties.
3. Canada: Some Canadian mines also produce yellow diamonds, albeit on a smaller scale.
4. Australia: The Argyle mine, although mainly known for pink diamonds, has also produced yellow diamonds.
5. Russia - due to the known sanctions, we currently do not offer diamonds of Russian origin:
However, the region around Siberia in particular is known for diamond mines that also produce yellow diamonds.
A natural fancy yellow diamond with high clarity can be expected to cost between US$ 8,000 and US$ 12,000 per carat. For a stone with Fancy vivid, the price rises to CHF 18,000 to 35,000 per carat.
The orange color in fancy orange diamonds is created by a combination of factors within the diamond's crystal lattice. Primarily, the color is due to the presence of nitrogen atoms, similar to yellow diamonds. However, the arrangement and concentration of nitrogen in orange diamonds are somewhat different, leading to a different light absorption and thus an orange appearance.
Additionally, structural distortions in the crystal lattice, caused by the pressure and temperature conditions during the diamond's formation, can also contribute to the development of the orange color.
Orange diamonds usually present themselves in shades between yellow-orange and orange-brown. Pure orange is very rarely graded by gemmological institutes and is therefore almost as rare as red fancy diamonds.
Orange diamonds are very rare and can be found in various parts of the world, but there is no specific mine known for particularly high production. They are primarily mined in the same regions as other diamonds, including:
1. South Africa: One of the most renowned locations for diamond mining, which also produces orange diamonds.
2. Australia: The Argyle Mine is famous for its colored diamonds, and although it predominantly produced pink stones, orange diamonds have also been found there.
3. Canada: Canada has mines that produce a variety of colored diamonds, including orange variants.
The rarity of orange diamonds means that they do not occur in large numbers in any region but rather appear as rare finds in the major diamond mines of the world.
For an NF orange diamond with high clarity, a price of at least CHF 200,000 per carat can be expected. For a stone with fancy intense / vivid, the price rises to at least CHF 900,000.
Green diamonds receive their color primarily through natural irradiation. This irradiation occurs when diamonds lie underground for millions of years near radioactive minerals such as uranium or thorium. The radiation penetrates the diamond and alters the structure of the crystal lattice, causing certain light waves to be absorbed, which makes the diamond appear green.
The intensity of the green color depends on the duration and intensity of the irradiation, as well as the depth of penetration into the diamond. Green diamonds are extremely rare, especially those with an evenly distributed color, making them highly sought after in the market.
In addition to the intensity, the overtones that occur also have a decisive influence on the color effect. Due to the large variance of overtones, every green diamond is truly unique. The colors yellow, blue, brown and grey occur most frequently as overtones.
Natural green diamonds are extremely rare and can be found in different regions of the world. However, there is no specific region that is known for high production. Since green diamonds are formed by natural irradiation, their deposits are not limited to specific geological formations, but can occur anywhere where the necessary conditions have existed for millions of years. Some of the most important sites are:
1. South Africa: Known for a variety of diamonds, including green diamonds, due to the rich geological conditions.
2. Brazil: Some of the most notable green diamonds have been found in Brazil, which is known for its variety of mineral resources.
3. India: Historically, India has produced some famous green diamonds, although modern finds are rarer.
4. Russia - due to the well-known sanctions, we do not currently offer diamonds of Russian origin: But diamond mines in Siberia have also produced green diamonds.
For an NF Green diamond with high clarity, a price of CHF 40,000 to 70,000 per carat can be expected. For a stone with fancy intense / vivid, the price rises to at least CHF 180,000 per carat.
Natural pink diamonds get their color from a unique deformation of their crystal lattice. Unlike other colored diamonds, whose color is often created by impurities such as nitrogen or irradiation, the pink color is due to an unusual plastic deformation of the crystal lattice that occurs during the diamond's formation under extreme pressure and high temperatures.
This deformation causes a change in the way light is refracted through the diamond, resulting in the pink color. The exact mechanism is not yet fully understood, which contributes to the rarity and high value of these diamonds. Most pink diamonds were found in the Argyle mine in Australia, which was known for its exceptional colored stones before it closed in 2020.
Pink diamonds without an overtone are usually more valuable than stones with secondary colors. Exceptions are, for example, a purple overtone, which has a value-enhancing effect. The overtones make pink diamonds shine from delicate old rose to rich pink tones. The most common overtones are purple and brown.
The most common places to find pink diamonds are relatively limited, as these diamonds are extremely rare. The best known and most significant location was the Argyle mine in Australia, which was famous for its exceptional production of pink diamonds. This mine supplied up to 90% of the world's pink diamonds before it was closed in 2020.
In addition to Australia, pink diamonds have also been found on a smaller scale in other regions, including:
1. Canada: Some Canadian mines have also supplied pink diamonds.
2. Brazil: Pink diamonds have also been found in Brazil, albeit less frequently.
Despite their rarity, pink diamonds are highly sought after and valuable on the global market, making them one of the most sought after color diamonds.
For an NF pink diamond with high clarity, a price of CHF 50,000 to 130,000 per carat can be expected. For a stone with fancy intense / vivid, the price rises to CHF 170,000 to 700,000 per carat.
Blue color diamonds get their color mainly from the presence of boron in their crystal structure. Boron can be incorporated into the crystal lattice during the formation of the diamond deep in the Earth's mantle. Boron atoms change the way light is refracted through the diamond by absorbing mainly red light waves, which gives the diamond its blue color.
The intensity of the blue color depends on the amount of boron present. Some of the most famous blue diamonds, such as the Hope diamond, show an exceptionally deep blue color due to a higher concentration of boron.
Blue diamonds are extremely rare and are mainly mined in certain regions of South Africa, particularly in the famous Cullinan mine, which has produced some of the most famous blue diamonds in the world.
Without overtones, blue diamonds are a real rarity. Most blue diamonds have a gray overtone, often also a green one. Natural blue diamonds without overtones are the most valuable.
The most important locations for blue diamonds are relatively limited, as these diamonds are very rare. The most important locations include:
1. the Cullinan mine, South Africa: this mine is the most famous location for blue diamonds and has produced some of the most famous blue diamonds in the world, including the Hope diamond and the Blue Moon of Josephine.
2. Golconda region, India: Historically, the mines in the Golconda region have produced some significant blue diamonds, although these mines are no longer in operation.
3. Australia: The Argyle mine, known for pink and brown diamonds, has also produced some blue diamonds, albeit in much smaller quantities.
4. Canada: Some Canadian mines have also found blue diamonds, although these finds are rare.
These sources are known for their unique geological conditions that contribute to the formation of blue diamonds.
For an NF Blue diamond with high clarity, a price of CHF 180,000 to 350,000 per carat can be expected. For a stone with fancy intense / vivid, the price rises to at least CHF 400,000 per carat.
Red natural diamonds are extremely rare and get their color from an unusual plastic deformation of their crystal lattice. Similar to pink diamonds, the red color is not the result of impurities, but is caused by structural changes in the diamond's crystal lattice.
During its formation deep in the earth's mantle, the diamond is exposed to extreme pressure and high temperatures, which leads to a deformation of the crystal lattice. This deformation affects the refraction of light in the diamond and makes it appear red. The exact mechanism is not yet fully understood, which contributes to the rarity and high value of these diamonds.
The overtones create diamonds in a wider range of red tones. The overtones range from brown to orange. In contrast to all other color diamonds, red diamonds are classified exclusively in the Fancy Red intensity.
The overtones create diamonds in a wider range of red tones. The overtones range from brown to orange. In contrast to all other color diamonds, red diamonds are classified exclusively in the Fancy Red intensity.
Red diamonds have been found in very small quantities, mainly in Australia, Brazil and Africa. The Argyle mine in Australia produced some of the most famous red diamonds before it was closed in 2020.
An NF Red diamond with high clarity can be expected to cost at least CHF 1,500,000 per carat.
