Diamonds

Round Cut, also known as the brilliant cut, this is the most ubiquitous cut and shape, and the “Gold Standard” for diamonds. Some reports indicate that this cut accounts for up to 75% of diamonds sold today. The 58-facet cut, divided among its crown (top), girdle (widest part) and pavilion (base), is calibrated through a precise formula to achieve the maximum in fire and brilliance.
Oval Cut this cut is new, it was pioneered in the 1960s. This is an even and perfectly symmetrical design featuring 56 facets. Like the marquise, it is a modified round cut. The elongated shape here gives the stone more visual heft, so an oval-cut stone may appear larger than a round cut stone of the same weight.
Marquise Cut legend has it that the diamond-loving French King, Louis XIV commissioned this cut to match the unrivalled smile of the Marquise de Pompadour. It follows then that this cut is an elongated shape that comes to a point at both ends, with softly rounded sides. Like the oval cut, the marquise cut enhances the visual appeal of the stone, appearing larger than round cuts of the same carat weight.
Pear Cut the oval and marquise cuts come together brilliantly in the pear cut. Technically this is a modified round cut with 58 facets. It has all the visual virtues of the elongated shapes, but it also adds a delightful asymmetry into the mix.
Princess Cut, comes from the 1980s, but has proven very popular, especially in North America. This is a square or rectangular cut that often burns more brightly than the typical round cut. Another more material advantage of the princess cut is that it requires the least amount of wastage of the rough stone of all cuts.
Heart Shape this happens when you take the pear cut and put a cleft at the widest point. As a symbol of romance, this cut cannot be beaten, but it certainly earns no points for subtlety. It works best with larger stones, and is not typically as available as the round cut; this cut takes more skill to accomplish properly. This might affect the overall price too.
Asscher Cut the Asscher Company of Amsterdam developed this cut in the early 20th Century, this brilliant square is the ancestor of the radiant cut. The idea was to combine the emerald cut with the round cut, in a form characterised by extreme symmetry and dramatically cut corners. Like the emerald cut, this one is unforgiving of inclusions and poor color.
Trilliant Cut also developed by the Asscher company, and brought to New York in the 1960s, this cut is exceptional in its scintillating properties. Essentially triangular, it is distinguished by curved or straight sides, with pointed corners or rounded ones. Given the right depth of the stone, the trilliant may be more impressive than the round.
Rose Cut Various forms of the rose cut have been in use since the mid 16th century. The basic rose cut has a flat base and a crown composed of triangular facets in symmetrical arrangement, which rise to form a point. They are usually circular. Rose cuts are seldom seen nowadays, except in antique jewelry.
Radiant Cut by combining the round and the emerald cuts, gem cutters developed this cut in the 1970s. With between 62 and 70 facets, the radiant differs from the newer princess cut in that its corners are trimmed. This cut is basically what happens when gem cutters add a bit of scintillation to the sobriety of the emerald cut.
Cushion Cut is an update of the Old Mine cut from the 18th Century, it is a pillow-shaped cut with 58 facets, this cut has stood the test of time, and is, both classical yet daring. With rounded corners and facets typically larger than that in a round cut of similar proportion, the cushion cut works best with better stones.
Emerald Cut is a rectangular shape with cut corners. It is a very old cut that is unforgiving to inferior stones. It is known as a step cut because its concentric, broad and flat planes resemble stair steps. Inclusions and poor colour are more obvious in this cut while brilliance is reduced. This is a very striking cut for larger stones and typically has 50 to 58 facets. The inclusion-enhancement is also striking when it comes to emeralds, where inclusions add to the visual beauty of the stone.
Baguette Cut baguettes gained popularity during the Art Deco period, it is basically a modified emerald cut. Typically long and rectangular, the baguette-cut diamond has octagonal corners and step cuts, with just 14 facets.
3-Dimensional Cuts, these cuts are all identical all around, with patterns repeated across the stone. Where the typical stone shows a main face to the world, these cuts are designed to be truly multi-faceted. The nature of these cuts makes them best suited as pendants and earrings. There are 4 variants: briolette cut, drop cut, olive cut, ball cut.
The Chloe Diamond is a brilliant-cut diamond, weighing 84.37 carats, bought by Georges Marciano, the founder of clothing company Guess Inc. Marciano named the stone “the Chloe Diamond” after his then 12-year-old daughter.

The diamond sold for $16.2 Million at Sotheby's Geneva in 2007.
In November 2012, Christie's sold the cushion-shaped, colourless, 76.02-carat Archduke Joseph Diamond for $21.5 million.
A 14.23 carat diamond, named The Perfect Pink, sold for $23,165,968 in November 2010 to an anonymous buyer after an intense bidding war with four others.

Christie's says only 18 diamonds bigger than 10 carats and showing a distinct pure pink colour have ever gone on the block in 244 years of auction history.
The Wittelsbach-Graff Diamond is a cushion-cut fancy deep grayish blue diamond weighing 35.56 carats. It sold at auction in December 2008 for $24.3m

The diamond originates from the Indian kingdom of Golkonda. It's rumored that King Philip IV of Spain purchased the jewel and included it in the dowry of his teenage daughter, Margaret Teresa, in 1664.
On 15 May 2013 Christie’s auctioned the "Winston Legacy" in Geneva for $ 26.7m. A pear-shaped perfect diamond weighing 101.73 carats, this sensational gemstone is not only one of the largest pear-shaped diamonds known to date, it is also one of the world’s most perfect diamonds: a D colour, Type IIA Flawless gem.

The rough stone weighed 236 carats when it was extracted from the Jwaneng mine (DeBeers) in Botswana and required 21 months to polish.
The Orange - Christie’s Geneva sold the largest fancy vivid orange diamond ever offered at auction, weighing 14.82 carats, for a record $35.5m or $2.4 million per carat.

The sale set a world record price per carat for any diamond sold at auction, as well as a world record price for an orange diamond. It is the 4rd most expensive diamond ever sold at auction. Christie's said: “Time and again, a stone will appear on the market that is truly a miracle of nature. The 14.82-carat orange diamond is one such a stone, a rare gem, which will perhaps only be seen once in a lifetime.
The Princie Pink is a cushion-cut 34.65 carats and is one of the finest and largest of its kind.

The stone can be traced back to the ancient diamond mines of India. The diamond was sold at auction in 1960 where it brought a price of 46,000 pounds sterling (approximately $69,588 in today's currency).

The stone sold for $ 39m in April, 2013.

The Graff Pink is a vivid pink, round-cornered rectangular step-cut diamond weighing 24.78 carats, set between shield-shaped diamond shoulders, in platinum.

It sold on November 10, 2010 for $ 46.2m



The 59.6-carat Pink Star diamond lived up to its hype by selling for a world record price of approximately $83.4 million at Sotheby’s Geneva Magnificent Jewels sale Wednesday.

When introducing the internally flawless fancy pink vivid diamond, David Bennett, chairman of Sotheby’s Jewellery Division in Europe and the Middle East, called it “one of the most remarkable gems to ever appear at auction.”
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Sotheby's David Bennett says the diamond belongs in "the ranks of the earth's greatest natural treasures." He said "it was very rare to have vivid pink diamonds weighing only five carats, this 59.60 carat stone is simply off any scale." It is over twice the size of the 24.78-carat "Graff Pink" diamond that set the world auction record for $46.2m.

The gem, which was mined by De Beers in Africa in 1999, has received the highest possible colour and clarity rating from the Gemological Institute of America (GIA). It weighed 132.5 carats in the rough, and was cut and polished over a period of two years by Steinmetz Diamonds.


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Blue diamonds seldom hit the market and have been coveted by royals and celebrities for centuries, while a round cut is rarely used in coloured stones because of the high wastage.

The term "fancy" is used to describe a diamond of intense colour, while a gem's saturation grading ranges from light to vivid for coloured diamonds. In April, a rare 5.3-carat fancy deep-blue diamond was sold for £6.2 million ($9.5 million) at a London auction, then setting a record for price-per-carat at $1.8 million.



http://www.nytimes.com/2013/08/19/business/global/sothebys-to-auction-rare-diamond-in-hong-kong.html?_r=0





The Florentine Diamond is a lost diamond of Indian origin. It is light yellow in colour with very slight green overtones. It is cut in the form of an irregular (although very intricate) nine-sided 126-facet double rose cut, with a weight of 137.27 carats.

After the fall of the Austrian Empire during World War I, the stone was taken by Charles I of Austria into exile in Switzerland. The stone was stolen some time after 1918 by a person close to the Imperial family and taken to South America with other gems of the Crown Jewels. After this, it was rumoured that the diamond was brought into the United States in the 1920s and was recut and sold.
The Sun-Drop Diamond at 110 carats is the world’s largest yellow diamond. It sold at auction for $10.91m in 2011.
The Hortensia Diamond. Named after the Queen of Holland, the rock glittered on Napoleon's epaulette braid fastening and, later, on Empress Eugenie's comb. After the French Revolution, the diamond was snatched and later found in a bag of treasures in the attic of an old house in Paris. According to lore, the man who stole the precious gems disclosed the secret location just before his execution. Today, it's held in the Louvre's Gallerie d'Apollon.
The Blue Heart weighs 30.82 carats finished and was first recorded around 1900. The stone changed hands several times until it was donated to the Smithsonian Institution in Washington D.C. where it remains to this day.
The Ashberg diamond is one of the first diamonds discovered in South Africa in the mid 1860s and used to be part of the Russian Crown Jewels, a collection that started in 1719. After the 1920s, the Crown Jewels were transferred to the Kremlin Diamond Fund. In 1934 a Russian trade delegation sold the diamond to Mr. Ashberg.
The stone is 102.48 carats and is amber or brownish yellow with a glance of orange. (type Ib)
The DeYoung Red Diamond is one of the largest known natural fancy dark red diamonds. It is a modified round brilliant cut diamond that has a clarity grade of VS-2 and weighs 5.03 carats. The diamond was acquired by S. Sydney DeYoung, a Boston jeweler, as part of a collection of estate jewelry in which it was wrongly identified as a garnet. It was gifted to the National Gem Collection by Mr. DeYoung in 1987.
The Sancy weighs 55 carats and is a pear shape. It was first owned by Charles the Bold, Duke of Burgundy, who lost it in battle in 1477. The stone is named after a later owner, Seigneur de Sancy, a French Ambassador to Turkey in the late 16th century. He loaned it to the French king, Henry III, who wore it in the cap with which he concealed his baldness. Henry IV of France also borrowed the stone from Sancy, but it was sold in 1664 to James I of England. In 1688, James II, last of the Stuart kings of England, fled with it to Paris. It disappeared during the French Revolution. It reappeared in 1828. In 1867 it was displayed at the Paris Exposition. The Sancy surfaced in 1906 when bought by William Waldorf Astor, 1st Viscount Astor. The family possessed it for 72 years until the 4th Viscount Astor sold it to the Louvre for $1 million in 1978. The Sancy now rests in the Apollo Gallery.
The Koh-i-Noor, ("Mountain of Lights"), is a 105.6 carat diamond, believed to have originated in the state of Andhra Pradesh in India around 1300. It has been said that whoever owned the Koh-I-Noor ruled the world.

In 1850, the diamond was confiscated from Duleep Singh by the British East India Company and became part of the British Crown Jewels when Queen Victoria was proclaimed Empress of India in 1877. The diamond is currently set into the Crown of Queen Elizabeth and is on display at the Tower of London.
The Steinmetz Sirius is a 103.83 carat D IF cushion shaped diamond mined from the Premier mine in South Africa.

This legendary cushion shaped stone is claimed to be one of the largest D colored, internally flawless diamonds to ever appear at auction and is only the fourth of its kind (over 100 carat) to be sold at auction.
The Steinmetz Pink is 59.60 carats and rated in color as Fancy Vivid Pink by the Gemological Institute of America. The Steinmetz Pink is the largest known diamond having been rated Vivid Pink. The Steinmetz Group took a cautious 20 months to cut the Pink. Its origin and history is unknown.
The Kimberley Diamond gets its name from the mine in South Africa where it was found sometime before 1868. It was cut from a 490-carat stone. It was turned into a 70-carat gem in 1921 and recut to its present form in 1958 to improve its brilliance and proportions.