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christies green diamond

christies green diamond

A 6.13-carat fancy intense green diamond set a new per-carat record when it sold at Christie’s on May 27 for a whopping $3.6 million, or $594,510 per carat. The square cushion cut diamond is the center of a rose gold halo style ring, accentuated by natural pink diamonds.

Next to red, green is the rarest of colors found in natural diamonds. For most colored diamonds, the color comes from trace amounts of mineral impurities or extreme pressure conditions while the diamond was forming. The tight chemical structure makes it very difficult for any impurities to enter, which is why colored diamonds are exceedingly rare. Small amounts of boron in the crystal lattice structure of a diamond, for example, will impart a blue hue; same goes with nitrogen for yellow, and hydrogen for violet. What gives a diamond a green hue however, is the presence of natural radiation over millions of years. Because the radiation exposure is an external force rather than internal force (such as mineral impurities and lattice defects), it acts on the surface only. As a result, green diamonds are not green all the way through; the color is concentrated on the outer layers and tends to be weakly saturated. That is why a fancy intense green diamond, especially one of a size like this one, is almost a once-in-a-lifetime find.

This spectacular diamond joins the ranks of other recently sold, record-breaking gems at Christie’s. At their Geneva auction just last month, there were three record-breakers alone. They include ‘The Blue’, a fancy vivid blue pear shaped diamond weighing over 13 carats, a 76.5 carat light pink square-cut diamond that sold for $10.2 million, and the ‘Ocean Dream’ – a 5.5 carat, vivid blue-green diamond that went for $8.8million.

 

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jennymcJenny McCarthy is definitely not one to shy away from media! She shocked over 3 million viewers last Wednesday on live television via her morning talk show, The View by showing off a huge yellow sapphire and diamond ring and announcing her recent engagement to singer Donnie Wahlberg.

The former model, actress, one-time author and current co-host of The View was immeasurably ecstatic, jumping up and hugging co-hosts Barbara Walters and Sherri Shepherd. A slideshow of pictures of the happy couple played across the screen as Wahlberg made a surprise appearance from backstage, coming up to hug his sweetheart.

McCarthy’s bubbly and vivacious personality seems to match her engagement ring perfectly: a square brilliant cut yellow sapphire, surrounded by a halo of white diamonds set in a split shank pave white gold band. Known to be a spiritual person, she may have chosen a bright yellow stone to elicit inspiration, creativity, and optimism.jennymc

The actress and TV personality describes how Wahlberg had enlisted the help of her 11-year-old son, Evan, with the proposal. While sitting on the couch at their shared home, Evan brought out a card that said “Will” and handed it to her. He walked back into the other room, coming back with “You”. He returned a third time with a card meant to say “Marry” but spelled “Mary”. McCarthy was in laughter and tears before Donnie came out the last time, wearing a shirt imprinted, “Me?” and got down on one knee.

“Of course, I said ‘Yes,'” she related. “In that moment Evan yelled, ‘I have another dad!’ and it made all of us cry.”

McCarthy began dating the New Kids on The Block singer in May of last year. The pair plan to tie the knot sometime in August 2015.

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nizamThe Duchess of Cambridge stepped out on her first official event of the year in great style, with an elegant navy Jenny Packham evening gown and her signature wavy locks. But what stole the show was what she was wearing on her neck, a priceless diamond necklace known as the Nizam of Hyderabad.

Named after the man who bestowed this extravagant gift, it has been a part of the Royal Collection of Jewels since 1947 when the Nizam of Hyderabad gave it to Queen Elizabeth II as a wedding gift. At the time, the Nizam was one of the richest men in India, and he governed over an area that indisputably is the origin of the most valuable diamonds in the world. The Golconda region, located just west of the Hyderabad district has produced large diamonds of such purity and quality that many are located in museums and royal collections to this day. The Hope diamond (Smithsonian Natural History Museum), Daria-i-Noor (Central Bank of Iran), Koh-i-Noor (British Crown Jewels), and the Archduke Joseph (recently sold at auction for a record-breaking price) are some famous diamonds with Golcandan provenance.nizam

This is the first time where the Duchess has stepped out in jewels from the royal vault, and she chose the fundraising gala at the National Portrait Gallery in London.  Despite the host of celebrities also attending and the priceless paintings themselves, all eyes were on the Duchess’ neckline. Media reports speculate that Kate will be undergoing a change in wardrobe to look more regal in the coming months.

The Nizam of Hyderabad is constructed of colorless diamonds and platinum, featuring a double drop pear-shaped pendant and thirteen emerald cut diamonds. It is seen worn by the Queen in many official portraits, and like other priceless jewelry pieces is unlikely ever to leave the British Crown’s possession.

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CitrineWith its range in color from sunny yellow to bronze deep orange hues, what better stone to represent the falling leaves of autumn than citrine? One of the official birthstones of November, citrine is a member of the mineral family quartz.

Currently the world’s largest faceted citrine resides in the “Special Exhibit Gems” of the Art Natura museum in Spain, a natural science museum that is home to an extensive collection of colored gemstones. Known as “The Malaga” in tribute of its host city, this oval shaped gem is an enormous 20,200 carats – equivalent to 4 kilos! It neighbors another gemstone of gigantic proportions: the “Eldorado”, a 31,000 carat imperial topaz which also happens to be the other birthstone of November.

Despite its size, “Malaga” has very minor imperfections and is considered nearly flawless. Along with its exceptional color, even distribution, transparency and purity, “Malaga” is truly a world-class gem. Citrine crystals that are found usually measure only a few cm across, and the ones that are larger in size generally lack in quality and are used for decorative purposes rather than jewelry.

The rough that formed “Malaga” was originally discovered in 1990 in Brazil. Due to the complications of the process of cutting and polishing a stone this large, the rough was left untouched for nearly two decades until 2009 when a team of gem cutters took on the challenge. With all of the special considerations needed for a stone of this size, it took over a year to bring to its polished form.

Brazil is the largest producer of the world’s supply of citrines; other important sources include Bolivia, United States, and Madagascar.

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kimberly diamondThe New York Museum of Natural History is having an exhibition for the rare 19th century 55 carat diamond that was once part of the Russian Crown Jewels.

The stone is named “Kimberley Diamond” after the Kimberley Mine where it was discovered in South Africa in 1868. It had been cut from a 490 carat crystal. In 1921 it turned into a 70 carat gem and later in 1958 was re-cut and improved for brilliance and proportions.  In the re-cutting process the stone lost some weight 14.92 carats. Now weighing 55.09 carats it was valued at $500,000 but is probably worth considerably more now.

Kimberly Diamond has been perfected to a champagne coloured, emerald cut, rectangular flawless diamond. It is about 1.25 inches in length. It has been described as a “cape diamond” which is an Old World term meaning “deep colour.”

In order a diamond to survive the Earth’s surface it has to get there really fast this stone got a ride on magma. Magma starts very deep in the earth and moves towards the surface at 35-40 km/h. During a volcanic eruption the magma creates bubbles like champagne and can reach speeds up to Mach 2 (twice the speed of sound).

Diamonds were first found along rivers where people would look for gold. In the 1870’s lots of diamonds were found at the bottom of rivers and streams in South Africa. They would follow the river upstream and find a grey blue rock which contained a diamond. Now days a gem the size of the Kimberley diamond wouldn’t survive in modern mining techniques it would be crushed in the process.

The diamond will be on display with “Patricia Emerald” and “The Star of India.” Patricia Emerald is a 632 carat 12 sided emerald crystal from Columbia. The Star of India is the world’s largest gem quality blue star sapphire it is 526 carats in weight and is 2 billion years old!

Kimberly Diamond is on loan from Bruce T. Stuart. The stones will be added to the Morgan Memorial hall of Gems and is on display in the NYC museum through to June 2014.

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DiamondsThe short answer is yes, they can – and it’s not that uncommon.

Diamonds are the hardest material on Earth, however that doesn’t make them indestructible. To understand how and why they chip, we must first separate the concepts of hardness and toughness. These two terms are often confused for one another, but they are not related in any way. Hardness essentially is a measure of how resistant a substance is to being scratched. Hardness depends on the strength of bonds between atoms in the crystal, and also can vary depending on the direction (along the crystal planes) in which this property is measured. This is why, although much less likely, diamonds can be scratched; and they most definitely can be scratched when coming in contact with other diamonds.

Toughness is the measurement of the ability of a material to resist fracturing, breaking, chipping, or cracking in general. The toughness scale ranges from: Exceptional, Excellent, Good, Fair, to Poor, in which diamond only ranks at a Good. A diamond has a cubic crystal matrix, in which there are four perfect cleavage directions. A cleavage direction can be described as a series of side-by-side straight grains running in one direction, such as the graining on a piece of wood. It is a plane of weakness in the molecular crystal of the diamond. Due to these points of weakness in the diamond structure, it is very possible for a diamond to chip and fracture in everyday wear and tear – it wouldn’t necessarily need a big impact for a diamond to chip, only enough of an impact at the right angle.

The shape of a diamond also factors into how likely it is to chip. Acute angles are much more chip-prone than obtuse angles. For example, in round diamonds the areas most likely to chip would be along the girdle edge or the culet (if pointed). However when round diamonds are set in a piece of jewelry the culet is almost always protected, so it is more common to see chips occur on the girdle. For fancy-shapes with pointed girdle edges, the risk of chipping increases. Princess, Marquise, Pear, Heart and to a slightly lesser extent Emerald and Radiant have a higher percentage of damage on the pointed girdle edge. This is why they are always set with prongs protecting the sharp edges.

If you are panicking because you have chipped your diamond or fear of doing so – read on to Part 2: Tips to Prevent Damaging a Diamond

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DiamondThe most flawless, biggest briolette ever to surface at auction weighing at a stunning 75.36ct broke records! This diamond was sold for a world record at $11,145,734 from an anonymous buyer at Christie’s Hong Kong’s Magnificent Jewels sale. This pendant necklace was originally valued at a pre-sale low estimate of $8.5 million, which it easily surpassed.  It did fall short of its high pre-sale estimate of $12.5 million.

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The briolette is a traditional cut popular in the Victorian times but has recently become more popular in precious and semi-precious stones. It is a stone cut into a three-dimensional waterdrop shape.  Its elegant pear shape with cut facets dangles below a marquise-cut purplish-pink diamond. Adorned with stations of smaller briolettes with 18 karat white and rose gold adjustable neck chain, this piece is a classy stunner!

An auction spokesperson said the diamond was “perfect,” and had the proof of an assessment with the Gemological Institute of America. The GIA rated the stone Type IIa, which is the top quality grade.  The diamond is similar to the British Queen Elizabeth’s one she has set in her crown. Christie’s jewellery specialist, Chiang Shui-Fung, says the diamond is extremely rare.

The briolette is special because they have to find a piece rough and big enough to cut into that style. The diamond came to an American dealership named William Goldberg, as a 160.5- carat rough weight and had to be shaped into the now 75.51 carat diamond. To achieve this brilliant rare cut William Goldberg had to sacrifice more than half the stone’s weight in the meticulous cutting process. The diamond is now a stunning piece and will be remembered as a historical record breaking event.

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Red DiamondsThe Australian Argyle Diamond Mine will feature three ultra-rare red diamonds in the upcoming Pink Diamond Tender. This is the most it has featured in 30 years.  They began mining in 1983 and only six diamonds have come out of the mine as certified Fancy Red by the Gemological Institute of America. This is a very notable time for red diamonds.

Also for the first time in eight years it will feature a diamond bigger than 3 cts: a 3.02 ct. fancy pink radiant going by the name of “Argyle Imperial.” There is another weighing at 1.56-carat which is round fancy red called the “Argyle Phoenix.”

Josephine Johnson Argyle Pink Diamonds Manager had this to say about it. “Since mining began in 1983 only six diamonds certified as fancy red by the Gemological Institute of America have been presented for sale at the annual tender. To have three of these rare red diamonds in one tender is a very special moment in time.” They will be presented for sale at the annual tender. The diamonds will have their world debut first in Sydney. Then tender viewing will take place in Hong Kong, Perth, and previews in Tokyo and New York with bidding closing in October. All vividly naturally coloured diamonds are expensive but red diamonds are so rare that many think their price might double in the next couple of years.

The Argyle mine produces the world’s entire supply of pink diamonds with the red seen as the top pinnacle of the colour scale. Japan is the largest consumer of pink diamonds since the cherry blossom tree inhabits the land there the shade of pink is highly favorable to them.Argyle Pink

Fancy red diamonds are the rarest naturally coloured diamonds. Very few diamonds receive a grade of fancy red. This grade of fancy red means that the diamond is pure red and has no modifying colour.  No one really knows how the diamond gets to be this colour. It is thought that it gets its colour from a molecular structure distortion as the jewel journeys up from the crusts earth to the surface.  Another thought is that the diamond could get its colour from nitrogen atoms. Diamonds are made up of carbon atoms bonded together, sometimes there are gaps within these atoms and scientists think that the gaps and nitrogen cause the red colour. They are shaped by millions of years of crystallization. Either way the natural colour of a fancy red is unmistakable and breath taking. Diamonds come in different colours including, champagne, yellow, pink, red and purple.  Natural and treated colour diamonds are two completely different markets.

Check out a local jewellery boutique store for more information and to view some different coloured diamonds in a variety of shape and cut. If you are looking for that perfect custom diamond to add to an engagement ring its best to shop at a local jewellery store where they have trusted customer service and can help you find the exact unique coloured stone that’s right for you.

 

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