Diamond Colour is one of the 4c’s used to calculated diamond value
Polished diamond prices are derived from a variety of factors, including supply and demand, the quality and characteristics of the individual diamond, and market conditions.
The prices of polished diamonds are primarily determined by the 4Cs: carat weight, colour, clarity, and cut. These factors are assessed by gemologists and other experts who evaluate the diamond’s physical properties, such as its size, colour, clarity, and overall quality of cut.
Other factors that may influence the price of polished diamonds include the type of diamond, such as whether it is a natural or lab-grown diamond, the country of origin, and the overall market conditions for diamonds. Additionally, the reputation and credibility of the seller or the dealer can also affect the price of the polished diamond.
Overall, polished diamond prices are determined by a complex combination of factors, and can fluctuate over time based on changes in supply and demand, market conditions, and other economic and industry factors. There is no single diamond price list that accurately reflects the prices of all diamonds. This is because the price of a diamond depends on a number of factors, including its size, shape, colour, clarity, and other characteristics.
That being said, there are various industry-standard diamond price lists that are commonly used as references by professionals in the diamond trade. These lists are typically based on a standardized grading system and provide price ranges for diamonds of different sizes, shapes, and quality grades.
The most commonly used diamond price list is the Rapaport Diamond Report, which provides a benchmark price for diamonds based on their 4Cs grading (carat weight, colour, clarity, and cut). However, it is important to note that the Rapaport price list only reflects the wholesale price of diamonds and may not necessarily reflect the retail price that consumers will pay.
Other diamond price lists include the International Diamond Exchange Price List, the Idex Diamond Price Report, and the Polished Prices Diamond Index, among others. These price lists may differ in their methodologies and grading systems, and the prices they list may vary slightly from one another.
Ultimately, when buying or selling a diamond, it is important to work with a reputable and knowledgeable diamond professional who can help you evaluate the diamond’s characteristics and provide you with an accurate price estimate based on current market conditions. Source: Michael Cohen DCLA
Diamond traceability refers to the ability to track the journey of a diamond from its source to the market. This includes tracing the diamond’s origin, the path it takes through the supply chain, and the ultimate destination where it is sold to consumers.
Diamond traceability is important for a number of reasons. For one, it can help ensure the ethical and sustainable sourcing of diamonds, by allowing for greater transparency and accountability in the supply chain. This can help prevent the trade of conflict diamonds, which are used to finance armed conflict and human rights abuses. Additionally, diamond traceability can help provide assurance to consumers that the diamonds they purchase are of high quality and have been sourced responsibly.
The diamond industry has established various initiatives to promote diamond traceability, including the Kimberley Process Certification Scheme, which aims to prevent the trade of conflict diamonds, and the Responsible Jewellery Council, which sets standards for responsible sourcing practices in the industry. Additionally, some diamond producers have implemented blockchain technology to enable the secure tracking of diamonds throughout the supply chain.
Certification is another key aspect of diamond traceability. By obtaining a diamond certificate, which includes a record of the diamond’s characteristics and its journey through the supply chain, consumers can be assured that the diamond they are purchasing is of high quality and has been sourced responsibly. Overall, diamond traceability is an important aspect of the diamond industry, as it can help promote responsible sourcing practices and provide assurance to consumers about the quality and authenticity of the diamonds they purchase.
While it may not be possible for an individual to physically track a diamond from the source, certification and other industry initiatives can help ensure the ethical and sustainable sourcing of diamonds, as well as provide assurance to consumers about the quality and authenticity of the diamonds they purchase.
One technique used to determine the origin of diamonds is through the analysis of their chemical composition. Diamonds from different geographic locations can have different trace elements and isotopic compositions, which can be used to identify their origin. For example, diamonds from different mines in South Africa can have different isotopic signatures.
Another method to determine the origin of a diamond is through the use of spectroscopy, which involves analyzing the unique spectral characteristics of a diamond. This can provide clues about its origin and the geological conditions under which it formed.
It’s worth noting that while these techniques can provide clues about a diamond’s origin, they are not foolproof and may not provide a definitive answer in every case. Nonetheless, advances in technology and the diamond industry’s commitment to responsible sourcing have made it increasingly possible to track and trace diamonds from their source.
Argyle pink diamonds are extremely rare and highly sought-after, making them some of the most valuable diamonds in the world. The Argyle diamond mine in Western Australia is the primary source of pink diamonds, and it is estimated that only 0.01% of the diamonds recovered from the mine are pink in colour, with an even smaller percentage being of the highest quality.
The Argyle mine ceased operations in 2020, which has led to speculation that the prices of pink diamonds, including argyle pink diamonds, may increase in the coming years. With the mine no longer producing new stones, the limited supply of these rare diamonds is expected to drive up demand and prices. However, like any investment, it’s important to carefully consider market trends and consult with a qualified professional before making any decisions.
The largest pink argyle diamond found to date is the Argyle Pink Jubilee, which was discovered at the Argyle mine in Western Australia in 2011. The diamond weighs 12.76 carats and is a vivid pink colour, making it one of the largest and most valuable pink diamonds ever found. The Pink Jubilee was cut and polished over a period of ten months, during which time the rough diamond was studied and analyzed extensively to determine the best way to bring out its natural beauty and maximize its value. The diamond was sold at auction in 2013 for an undisclosed sum, but it is believed to have fetched a record-breaking price per carat for a pink diamond.
Red diamonds are extremely rare, even more so than pink diamonds. It is estimated that only a handful of natural red diamonds are found each year, and most of them are less than half a carat in size. Red diamonds are so rare that many jewelers and gemologists may go their entire careers without ever seeing one.
The red colour in diamonds is caused by the presence of a rare mineral which causes “graining,”, This occurs when the crystal structure of the diamond is distorted during its formation. The graining causes the diamond to absorb green light and reflect red light, resulting in a beautiful and distinctive red hue. Because of their rarity, red diamonds are among the most valuable and expensive gemstones in the world. They are highly sought-after by collectors and investors, and prices for top-quality stones can reach millions of dollars per carat at auction.
Blue diamonds are also quite rare, but not as rare as pink or red diamonds. Blue diamonds account for only about 0.02% of all diamonds mined worldwide. The blue colour in diamonds is caused by the presence of trace amounts of boron during their formation, which causes the diamond to absorb red, yellow, and green light, resulting in a blue hue.
Blue diamonds are highly prized for their unique colour and rarity, and they can command very high prices at auction. The value of a blue diamond depends on a variety of factors, including its size, colour intensity, clarity, and overall quality. Blue diamonds range in colour from pale blue to vivid blue, with the most valuable stones being those with a deep, rich blue colour.
One of the most famous blue diamonds is the Hope Diamond, which is a 45.52-carat blue diamond that is part of the Smithsonian Institution’s collection of natural history specimens.
The most expensive diamond ever sold is the Pink Star, a 59.60-carat oval-cut pink diamond that was sold for $71.2 million at a Sotheby’s auction in Hong Kong in 2017. The diamond, which is the largest internally flawless fancy vivid pink diamond ever graded by the Gemological Institute of America (GIA), was mined in Africa in 1999 and took two years to cut and polish.
The Pink Star was originally sold at auction in 2013 for a record-breaking $83 million, but the sale was later cancelled after the buyer defaulted on the payment. The diamond was put back up for auction in 2017 and sold to a jewelry retailer in Hong Kong for $71.2 million, setting a new world record for the most expensive diamond ever sold at auction.
Yellow diamonds are not as rare as pink, red, or blue diamonds, but they are still considered rare and highly prized. Yellow diamonds are formed when nitrogen atoms are trapped in the crystal lattice structure of the diamond during its formation, causing it to absorb blue light and reflect yellow light.
The intensity of the yellow colour in a diamond can vary widely, ranging from a pale yellow or light lemon colour to a deep, intense yellow. The most valuable yellow diamonds are those with a deep, rich colour that is evenly distributed throughout the stone.
Yellow diamonds are mined in various parts of the world, including South Africa, Australia, and Canada. While yellow diamonds are not as rare as some other coloured diamonds, high-quality yellow diamonds can still command very high prices at auction, especially those with a large carat weight and intense colour.
Orange diamonds are considered rare and highly valuable. The orange colour in diamonds is caused by the presence of nitrogen and other impurities in the crystal lattice structure of the diamond, which absorb blue and green light, resulting in an orange hue.
Orange diamonds can range in colour from pale orange to a deep, vivid orange, with the most valuable stones being those with a pure and intense colour. Orange diamonds are not as commonly found as white or yellow diamonds and are considered much rarer than brown or gray diamonds.
The most famous orange diamond is the Pumpkin Diamond, a 5.54-carat fancy vivid orange diamond that was mined in South Africa. The Pumpkin Diamond was sold at auction in 1997 for over $1.3 million, and it is now part of the collection at the Smithsonian Institution’s National Museum of Natural History in Washington, D.C.
The Bank of Tanzania announced that the country’s diamond exports increased significantly to $63.1 million (USD) in value by November 2022. This is more than seven times of the $8.4 million export value that was recorded in the year-over year analysis since November 2021.
The good performance of the company has been attributed to the country’s diamond producer Williamson Mines which has temporarily shut down operations due to a recent tailings breach on November 7, 2022. The mine is an open pit operation located on the 146-hectare Mwadui kimberlite pipe, which is one of the world’s largest economic kimberlites.
The company belongs to the parent company Petra Diamonds, which owns 75 percent of the company, and the Tanzanian government owns the remainder. According to Petra’s official statement, production at the Williamson mine will resume in the 2024 fiscal year.
Sarine Technologies has agreed to acquire a majority share in New York-based Gem Certification and Assurance Lab (GCAL) amid a push to expand in the American market.
“At the beginning of last year, we started ramping up our activities in the US,” Sarine CEO David Block told Rapaport News on Thursday. “Due to that, the discussions with regard to this [deal] ramped up along with our involvement in the US market. This [deal] should be quite a significant jump in the scope of our business in the US.”
Israel-based Sarine has signed a nonbinding memorandum of understanding (MoU) to purchase the stake for an all-cash consideration, it announced in a statement on Wednesday. The parties plan to reach a final agreement in a few months once due diligence is complete, Block said. The companies have not disclosed the sale price or the size of the share.
GCAL will continue to offer its customers the same products and services as before the deal, and its executives will remain in charge, Sarine said.
However, while currently operating out of a single location in New York, GCAL will be able to implement Sarine’s e-Grading — an automated grading service using artificial intelligence (AI) — to develop the lab’s capabilities across the US and globally. The companies will begin integrating their technology and services even before the deal closes, Block explained. Sarine will continue to offer its services independently outside the US.
Founded in 2001 by Don Palmieri, family-owned GCAL is known for providing diamond certificates carrying a guarantee, rather than just reports that act as a description of grades. In 2021, it launched 8X, a cut-grading standard that it claims is more exacting than the industry’s triple Ex score.
“Sarine’s technologies will allow us to continue to abide by [our] key code of ethics while still expanding our services to meet the growing demand by consumers seeking confidence that their acquired products and services meet all norms of quality and sustainability,” said GCAL chief operating officer Angelo Palmieri.
Pink and yellow diamonds from two iconic Rio Tinto mines – Argyle and Diavik – have been brought together to create a unique ring.
It’s called Diavik Midnight Sun and has been valued at $1.24m.
An 18.08 carat fancy intense yellow oval diamond from Diavik, in sub-Arctic Canada, contrasts with an intricate setting of rare Argyle pink diamonds, from the now-closed mine in in the remote East Kimberley region of Western Australia, weighing 4.09 carats in total.
The yellow diamond was cut from a 36.75-ct rough gem, described as one of the finest large yellow diamonds uncovered at Diavik.
Rio Tinto’s general manager of sales and marketing for its diamonds business, Patrick Coppens said “This combination of a rare yellow Diavik diamond and Argyle Pink Diamonds, the rarest diamonds in the world, is a special moment in the history of Rio Tinto’s unique place in the natural fancy coloured diamond industry.
He paid tribute to luxury jeweler Musson for creating the ring. The Diavik Midnight Sun takes its inspiration from the exquisite natural phenomenon that occurs when the sun is seen at midnight in the Arctic, exhibiting beautiful golden and pink hues.
A rivière diamond necklace was the top seller at Christie’s Magnificent Jewels in Hong Kong on Monday, bringing in $5.9 million.
The sale price for the piece, which features 52 round brilliant-cut, D-flawless and internally flawless diamonds weighing a total of 104.84 carats, was within estimates. In total, the November 28 auction achieved $46.2 million, with 50% of the jewels on offer exceeding their high estimates, Christie’s said Monday.
The company sold 86% of available lots, or 82% by value, and drew global participation from 21 countries across three continents.
The auction also included a collection of jewels from Hong Kong actress Rosamund Kwan, which fetched a combined total of $11.1 million. The two leading lots from that sale saw heavily competitive bidding, lasting over 15 minutes, Christie’s noted. The top item in the group was a necklace featuring a pear brilliant-cut, 22.18-carat, D-color, VVS1-clarity diamond pendant with rubies and pink diamonds, which went for $2.1 million, within estimates.
Here are the rest of the top five:
A jadeite, diamond and sapphire necklace by Etcetera sold for $2.8 million against a presale estimate of $2.6 million to $3.8 million.
This cushion modified brilliant-cut, 60.79-carat, fancy-vivid-yellow, VS2-clarity diamond ring brought in $2.7 million, in the middle of its $2.3 million to $3.6 million presale range.
A round brilliant-cut, 19.61-carat, D-flawless, type IIa diamond ring exceeded its $1.7 million to $2.3 million presale estimate, bringing in $2.4 million.
This oval-cut, 5.32-carat Burmese pigeon’s blood ruby ring with pear-shaped diamonds by Cartier Paris achieved $2.1 million, within its expected range of $1.9 million to $2.3 million.
Jefferson Ncube, an illegal diamond miner from Zimbabwe, works on his latest tunnel at an abandoned De Beers mine near Kleinzee, South Africa.
Bracing against the vibrations of the jackhammer, illicit diamond miner Jefferson Ncube bores steadily into the rock face before him, sending chunks of dry stone clattering to the ground and filling the air with a cloud of pale gray dust. He’s 30 feet below the surface of the desert in the Namaqualand region of South Africa in a tunnel barely tall enough to crawl through.
“I don’t enjoy this at all, but I need the money,” says Ncube, who holds a degree in agricultural science from the University of Pretoria but says he has been unable to find work elsewhere. “I have a family to support, a wife and a 1-year-old child.”
The Nuttabooimine, near the coastal town of Kleinzee, was once mined by the diamond giant, De Beers, the largest of dozens of industrial mining operators who, for the best part of a century, formed the backbone of the region’s economy.
A diamond miner hauls up a bucket of gravel at an illegal mining site in South Africa’s Northern Cape Province.
But over the past 20 years, rising operational costs and a dwindling supply of diamonds have made large-scale industrial mining increasingly unviable. The sector’s steady decline has left a legacy of chronic unemployment in Namaqualand but has also created opportunities for a growing number of desperate young men and women willing to tolerate hardships and dangers as they eke out a living in abandoned mines.
Known locally as “zama-zamas” — loosely, “ones who try their luck” in isiZulu — unlicensed miners like Ncube are considered illegal by the government. Yet here on South Africa’s wild and diamond-rich Atlantic coast, residents say the number of zama-zamas has burgeoned in recent years, fueled by the lack of jobs, the economic impact of the COVID-19 pandemic and the rising cost of living, as well as by political and economic crises in neighboring countries.
An ilegal diamond miner breaks up rocks at the Nuttabooi mine near Kleinzee, South Africa.
Earlier this year, South Africa’s minister of Mineral Resources and Energy, Gwede Mantashe, described illegal mining as a “plague” amid reports of rampant corruption, extortion and violence linked to zama-zama activity across the country, not only in relation to diamonds but also coal, and other minerals such as gold and chromite. Once confined largely to the country’s estimated 6,100 abandoned or ownerless mines, officials say illegal mining is increasingly spilling over into operational mines too.
Ncube is part of a 12-man team, all of them migrants from Zimbabwe, where hyperinflation and unemployment have made it all but impossible to build a stable life for their families. Out in the desert, living conditions are bleak and working conditions even worse, but with some basic tools and a little knowledge of geology, they manage to make ends meet. The men, almost all of whom have arrived in the past two years, share the work and split whatever profits they make.
Members of an illegal diamond mining collective look down a mineshaft at the Nuttabooi mine.
“We dig down until we hit the bedrock, then we go sideways through this belt,” says Ncube, pointing at a band of rock and gravel on the side wall of the tunnel. “This is where we find the diamonds. In the past, they used hammers and chisels. But if you use a jackhammer, you can take out more rock and then there are more diamonds for you.”
Danger in the tunnels
A zama-zama uses a jackhammer to break up rock in an abandoned De Beers mine.
The miners have little in the way of safety equipment, and their tunnels are prone to collapsing. A little more than half a mile from here, at the neighboring Bontekoe mine, a simple granite plaque in the desert commemorates the miners who lost their lives in a particularly deadly collapse in 2012. Smaller accidents occur frequently and often go unreported. Community leaders say that at least six people have died at Nuttabooi alone in the past few months.
To try to stay safe, Ncube and his colleagues make a point of leaving “pillars” at 6-foot intervals as they tunnel through the ground. But it’s an imperfect system, made harder by the fact that tunnels dug by different groups of miners often collide.
An illegal diamond miner looks out from the top of a De Beers mine that has since been taken over by zama-zamas.
“If the hole is ‘paying,’ people get greedy and they eat away at the pillars until the whole thing is just hanging,” says Ncube. “That’s how some guys died just two holes away from here. If you get greedy you’ll die down here, and then your family will suffer even more.”
After handing over to a colleague, Ncube climbs carefully back up the vertical mine shaft and hauls himself over the edge. At the surface, in a stark, lunar landscape of craters and piles of rubble, zama-zamas cluster together around their holes, sifting through gravel and chatting over the low hum of diesel generators. A few hundred yards away, the old De Beers mine lies abandoned, a massive scar on the face of the desert, hemmed in by towering mine dumps.
“De Beers has taken all the diamonds out of Namaqualand and now we’re back in poverty,” says Andrew Cloete, a longtime illicit miner who lives in a small tent of black and red plastic sheeting in the ever-expanding squatter camp below the Nuttabooi mine. “The companies left us like they found us — with nothing. But if we just sit there thinking about it, our kids will die. So we, the diggers, come in here and take the scraps.”
Andrew Cloete, a diamond miner and activist for mining rights, photographed in his shack in a squatter camp at the Nuttabooi mine in Namaqualand, South Africa. The government considers the activity at Nuttabooi illegal because the miners do not possess permits.
The plight of the zama-zamas
There is a palpable sense of anger, particularly among the miners who grew up in Namaqualand, over how little of the region’s diamond wealth has stayed in the local area. Over several decades, vast quantities of diamonds have been exported overseas, yet most of the area’s roads are still unpaved, service provision is haphazard at best and poverty and alcoholism are endemic. Unemployment in the province stands at over 46%.
“Africa’s f***ed up. We don’t have jobs, all we have is minerals — but they’re being looted by the West,” said one miner, an unemployed mechanical engineer who didn’t want to be named, citing concerns that he may be targeted by the authorities. “This is our Africa. This is our land. These are our minerals.”
Zama-zamas have little bargaining power and are forced to sell their finds to black-market buyers for a fraction of their true value.
Outside Cloete’s tent, men wander through a small city of plastic lean-tos that has sprung up in the desert over the past two years. The camp has enveloped a handful of derelict buildings left behind by the mining companies, where zama-zamas now sleep side by side on filthy mattresses on the floor. The camp, home to around 1,500 people, has no electricity, running water, clinics or sanitation but a surplus of bars and taverns that do a steady round-the-clock trade.
“Nobody would live in conditions like this if there wasn’t a need,” says Cloete, gesturing toward the scene outside. “We’re here because of poverty, hunger and joblessness.”
They’re not getting rich off their diamonds
Diamond miners at an illegal dig site in Namaqualand, South Africa.
After lighting a cigarette, Cloete reaches for a small glass jar and takes out a plastic packet from inside. Carefully, he empties its contents into his palm. About a dozen small, rough diamonds tumble out. On international markets they might fetch a substantial sum, he says, but due to the illegal nature of their work, the zama-zamas have little bargaining power and are forced to sell their finds to black-market buyers for a fraction of their true value.
“They buy diamonds like they’re buying sweets,” complained one zama-zama. “You get people buying diamonds for 100 Rand [about $5.50].”
Cloete, who founded an informal group of mineral rights activists known as the “Mining Fighters,” has spent years petitioning the South African government to find a productive way to formalize zama-zama mining, a move that he says would lead to safer working conditions and a fairer marketplace for local diamonds, as well as bringing in considerable revenue for the government. Similar systems are in place in many other African countries, where so-called artisanal mining, carried out by individuals or small groups using traditional methods and basic equipment, is now a major employer and revenue generator.
A swimming pool lies empty in the town of Kleinzee in the Namaqualand region of South Africa.
The town was once the property of the De Beers diamond company. In its heyday, it was a thriving settlement of 4,000 people with about 30 recreational clubs. After closing down its mines in the region, De Beers sold off the town, which is now largely empty.
But Cloete says he has yet to receive a response. “They treat us like we’re criminals,” he says.
Many in the formal diamond sector would also like to see the legalization and regulation of informal mining, which they say hampers their legal operations and fuels a parallel black market in illegal diamonds.
“At the end of the day, it’s a situation that’s totally unbearable for us,” said Gert Van Niekerk, chairman of the South African Diamond Producers Organisation, an industry body representing legal diamond miners. “This is not the Wild West.”
Kim Cupito
Kim Cupito, who lives with her husband in a derelict building left behind by De Beers, lost her job during the pandemic. “We need to survive, and this is God’s ground. It’s for everybody,” she says.
In Kleinzee, a faded mining town once owned by De Beers, where most homes now lie empty, residents say the influx of illegal miners from around South Africa and neighboring countries has led to a rise in crime.
The uncertain future faced by zama-zamas
“Zama-zamas aren’t welcome here,” said one Kleinzee restaurateur. “They have knives, they have guns, they’re gangsters. They can come and buy things here, but afterward they must leave. We don’t want them here.”
Illegal diamond miners try to get phone reception at a mining site in Namaqualand, South Africa.
In a policy document released in March, South Africa’s Department of Mineral Resources and Energy announced its intention to create a new police unit dedicated to combating illegal mining. It also laid out plans to make it easier for artisanal and small-scale miners to legally acquire mining rights by streamlining the expensive and time-consuming process of applying for a permit.
Police raids are frequent. In one major operation in July, a combined force of police and other law enforcement bodies backed by two helicopters and a spotter plane raided the Nuttabooi site, arresting over 100 people and confiscating 130 generators and 121 jackhammers, along with other equipment. But within days, mining activity had resumed.
But creating new legislation to support the policies could take time. And critics say it’s unrealistic to hope that many zama-zamas will voluntarily cease their activities, undergo training, comply with regulations and start paying taxes and royalties to the government, especially given that many are in the country illegally and would not be eligible for mining permits.
In the meantime, Namaqualand’s zama-zamas don’t intend to wait around.
“There’s nothing for us out there,” said Kim Cupito, a former fruit trader who lost her job during the pandemic and now lives with her husband in a derelict De Beers building with gravel piled up in the hallways and gaping holes in the roof. “We need to survive, and this is God’s ground. It’s for everybody.”
A 13.15 carat pink diamond will no longer be available at the upcoming Christie’s Magnificent Jewels auction in New York.
The emerald-cut, fancy vivid pink, VVS1 clarity stone, which carried a price estimate of $25 million to $35 million, was poised to be the December 6 sale’s showcase piece. Christie’s described the diamond as one of the largest of its kind to appear at auction.
“Christie’s confirms that the fancy vivid pink diamond ring has been withdrawn from sale in New York on December 6,” a spokesperson said. The company declined to comment further or provide a reason.
The item was scheduled to appear on display in Hong Kong on Friday. The removal was “very surprising,” said one colored diamond dealer in the municipality.
Colored diamonds have had a mixed season at auction. On November 8, the 18.18-carat Fortune Pink fetched CHF 28.4 million ($28.9 million) at Christie’s Geneva, toward the lower end of its presale estimate. The following day, a 5.53 carat diamond from the De Beers Exceptional Blue Collection failed to find a buyer at a Sotheby’s auction in the Swiss city.
With the 13.15 carat pink off the list, the top remaining item at the Magnificent Jewels sale is a pear modified brilliant cut, 31.62 carat, fancy blue diamond pendant with a price estimate of $10 million to $15 million.
A blue diamond pendant will be among the headliners in next month’s Christie’s sale in New York, where it is expected to bring in up to $15 million.
The pear modified brilliant-cut, 31.62-carat, fancy-blue stone, surrounded by white and pink diamonds, is potentially internally flawless, Christie’s said Tuesday. A pear brilliant-cut, 86.64-carat, D-color, VVS1-clarity diamond pendant will join it at the December 6 Magnificent Jewels sale. That piece, which hangs from a chain of 78 diamonds between 0.50 and 2.50 carats, is estimated at $5 million to $7 million.
Other notable items include a torque bangle bracelet bearing a heart brilliant-cut, 50.05-carat, D-color, internally flawless diamond, with a presale price of $3.7 million to $4.5 million. A modified pear double rose-cut, 5-carat, fancy-vivid-blue diamond ring has an upper estimate of $4 million and no reserve. An oval brilliant-cut, 51.60-carat, G-color, VS2-clarity diamond ring carries a high price of $2.8 million.
Christie’s will also offer an unmounted modified pear brilliant-cut, 104.04-carat, fancy-intense-yellow diamond. That jewel has an upper estimate of $2.5 million, as does a round-cornered square brilliant-cut, 107.46-carat, fancy-yellow diamond brooch by Graff. Meanwhile, an emerald-cut, 13.75-carat, fancy-vivid-yellow, internally flawless diamond ring by De Beers and an oval brilliant-cut, 2.21-carat, fancy-intense-blue diamond ring are set to fetch up to $1.8 million each.
Those items join the star of the show: An emerald-cut, 13.15-carat, fancy-vivid-pink diamond ring that Christie’s expects will fetch up to $35 million at the auction.