Category Archives: COUNTRIES

WHITE ROUGH DIAMOND FOUND IN OYSTER FROM CHINA VIDEO SHOWS

LIVE OYSTER BOUGHT FROM CHINA VIA AMAZON CONTAINED MANY PEARLS & A BEAUTIFUL ROUGH WHITE DIAMOND

The buyer of the oyster from Amazon from China shows it being opened live to discover the many pearls & to everyones surprise a sparkling white rough diamond.A must view for all.

Henry Sapiecha

www.www-gems.com

Never-Before-Seen Mineral Discovered Inside a Diamond

The diamond acted as a carrier, keeping a piece of calcium silicate perovskite stable as it moved towards the Earth’s surface.

Calcium silicate perovskite (CaSiO3) is thought to be the fourth most abundant mineral on the planet, but until recently, it had never been observed in nature. Above about 400 miles beneath the Earth’s surface, this elusive mineral becomes unstable. But as Michelle Starr of Science Alert reports, researchers have found a piece of CaSiO3 that managed to make it close to the surface of the Earth, encased in a very small diamond.

The diamond sliver was discovered at South Africa’s Cullinan diamond mine, which is best known for yielding two of the largest diamonds in the British Crown Jewels. According to Brandon Specktor of Live Science, the piece of CaSiO3 was visible to the naked eye once the diamond was polished, but an international team of researchers collaborated on analyzing the precious stone with X-ray and spectroscopy tests. They published the results of this analysis in the journal Nature.

The diamond was discovered less than 0.6 miles below the Earth’s surface, but the researchers note in the study that it was in fact a “super-deep” diamond. Most of these sparkly stones originate between 93 and 124 miles below the Earth’s surface. The one containing the CaSiO3 likely formed at a depth of around 435 miles, where the pressure is approximately 240,000 times greater than the atmospheric pressure at sea level. When this extreme force formed the diamond, the CaSiO3 was trapped inside.

The mineral did not deform as the diamond moved towards the Earth’s surface because the diamond acted as “an unyielding container,” Graham Pearson, a mantle geochemist at the University of Alberta and a co-author of the study, explains in a statement.

Pearson also says that the findings of the new analysis suggest there may be “as much as zetta tonnes of this perovskite in deep Earth.” (Zetta is a unit prefix equal to a factor of 1021, or a one followed by 21 zeros.) Scientists have long known that CaSiO3 was plentiful, particularly in “slabs of oceanic crust that have plunged into the planet’s mantle at tectonic boundaries,” Specktor of Live Science writes. But since nobody has been able to keep the mineral stable at accessible depths, it has proven very difficult to study.

Researchers at the University of British Columbia are now working to learn more about the mineral’s age and origin. The recent find also yielded interesting information about the processes that shape Earth, offering strong evidence of a very deep “recycling” of oceanic crusts, as the authors of the study put it.

“The specific composition of the perovskite inclusion in this particular diamond very clearly indicates the recycling of oceanic crust into Earth’s lower mantle,” Pearson said in the statement. “It provides fundamental proof of what happens to the fate of oceanic plates as they descend into the depths of the Earth.”

Henry Sapiecha

Gem Diamonds shares ablaze as miner discovers 910-carat rough diamond

A RARE FIND OF A 910 CARAT ROUGH DIAMOND IN AFRICAN DIAMOND MINE

Shares in Africa-focused Gem Diamonds (LON:GEMD) skyrocketed Monday morning after the miner announced the recovery of what it qualified as the fifth biggest gem-quality diamond ever found.

The 910-carat, D colour, Type IIa rough diamond was unearthed at the firm’s flagship Letšeng mine in Lesotho. According to analysts at Liberum, it may fetch as much as $40 million, based on previous sales of large quality stones.

The company’s stock leaped more than 17% on the news by midday Monday, the biggest intraday gain since 2010, trading at 93 pence.

To date, Gem Diamonds has recovered ten 100-carat-plus stones from its Letšeng mining

operation  inLesotho, and five of the 20 largest white gem-quality rough diamonds ever
found.

 

Since acquiring Letšeng in 2006, Gem Diamonds has found now five of the 20 largest white gem quality diamonds ever recovered, which makes the mine the world’s highest dollar per carat kimberlite diamond undertaking.

Up to now the company has recovered ten 100-carat-plus stones at Letšeng. One of them, a 357-carat stone found in 2015, sold for $19.3 million.

“This eawesome top quality diamond is the largest to be mined to date and highlights the unsurpassed quality of the Letšeng mine,” em Diamonds’ chief executive officer, Clifford Elphick, said in the statement.

Previous to today’s announcement, the biggest diamond dug at that mine was the 603-carat called Lesotho Promise, found in 2006.

At an average mountainous elevation of 3,100 metres (10,000 feet) above sea level, Letšeng is also one of the world’s highest diamond mines.

The biggest diamond ever found was the 3,106-carat Cullinan, dug near Pretoria, South Africa, in 1905. It was later cut into several stones, including the First Star of Africa and the Second Star of Africa, which are part of Britain’s Crown Jewels held in the Tower of London. Lucara’s 1,109-carat Lesedi La Rona was the second-biggest in record, while the 995-carat Excelsior and 969-carat Star of Sierra Leone were the third- and fourth-biggest.

Henry Sapiecha

www.www-gems.com

www.www-globalcommodities.com

Sierra Leone ‘Peace Diamond’ in the rough sold for less-than-expected

Still, the egg-sized, 709-carat rock fetched $6.5 million

Sierra Leone has sold one of the world’s largest diamonds ever found at an auction in New York on Monday, fetching a lower-than-expected price of $6.5 million

The egg-sized, 709-carat rough “Peace Diamond” is one of the largest ever discovered in the West African country and one of the world’s 20 biggest rough precious rocks ever found.

The egg-sized diamond was found in March in the country’s eastern Kono region by a Christian pastor who gave it to the government.The yellowish diamond is also one of the largest found in recent years at mines in southern Africa, closely behind Lucara Diamond’s (TSX:LUC) 1,111-carat rock discovered in Botswana in 2015.

It was sold to luxury jeweller Laurence Graff, chairman of Graff Diamonds, a British multinational jeweller based in London, said international diamond trading network Rapaport Group, which marketed and auctioned the stone for free.

As promised by the pastor who found the diamond and later donated it to Sierra Leone’s government, half of the proceeds from the auction will be used to fund infrastructure projects to benefit the community of the small village where it was discovered.

The country’s government will receive about $3.9 million of the final selling price as taxes, Rapaport said. Another $980,454 will enter a community development fund, while about $1 million will go to local diggers in the West African nation’s Kono district.

This is not the first “Peace Diamond” is put up for sale. A $7.8 million bid was turned down by the government of Sierra Leone in May. Two months later, authorities announced they would try selling it again.

Between 1991 and 2002, the Kono district — where the Peace Diamond was found — was at the centre of the “blood diamond” trade that funded the country’s brutal civil war as rebel groups exchanged gems for weapons.

Emmanuel Momoh, a 39-year-old pastor who is also one of hundreds of so-called artisanal miners in Kono, Sierra Leone’s key mining district, found this diamond — the second-largest ever found in the West African nation. (Image courtesy of National Minerals Agency of Sierra Leone.)

Henry Sapiecha

Kimberlite deposit in Nunavut Canada is far deeper than previously estimated

Peregrine Diamonds Ltd. (TSX:PGD) announced that the CH-6 kimberlite deposit at its Chidliak diamond project, located 120 kilometres northeast of Iqaluit, Nunavut, is twice as deep as it previously estimated.

“The 2017 resource expansion drill program at the CH-6 kimberlite has confirmed that the high-grade CH-6 kimberlite extends from surface to 540 metres below surface, an additional 280 metres below the 260-metre depth of the current CH-6 Inferred Resource announced on April 7, 2017,” the company said in a press release.

The Vancouver-based miner, who had its first kimberlite discovery at Chidliak in 2008, added that caustic fusion microdiamond results released from the 2017 drill program match well with pre-2017 microdiamond results for the KIM-L High Grade and the KIM-L Normal Grade kimberlite units. The KIM-L High Grade were estimated at 4.16 carats per tonne in the Inferred Resource, while the KIM-L Normal Grade were estimated at 2.12 carats per tonne.

These results, the junior mining company says, will form the basis of a revised CH-6 resource estimate whose expectation is that of extending the categorized resource base from a depth of 260 metres below surface to 540 metres below surface.

Peregrine sees potential for doubling the number of diamonds extracted from the site. In addition to this, the company’s President and Chief Executive Officer, Tom Peregoodoff, said that the expectations are high following the recovery of a very rare green diamond. “[The finding] bodes well for the presence of other rare, coloured diamonds that could have a significant impact on the overall average prices eventually received for diamonds recovered from the Chidliak project,” Peregoodoff said.

Henry Sapiecha

Alrosa prepared to now auction the most expensive diamond ever polished in Russia

Part of its “Dynasty collection,” consisting in five diamonds polished from a 179-carat rock found in 2015

Russian miner Alrosa  (MCX:ALRS), the world’s top diamond producer by output will auction Wednesday a rare collection of diamonds produced domestically, including the most expensive rock ever polished in the country — a giant 51.4-carat gem.

More than 130 potential buyers have already registered to participate in tomorrow’s online sale of the diamond collection, named after the dynasties of the Romanov, the company said in a statement. That family ruled for more than 300 years before the Russian Revolution.

The largest of all bears the same name as the entire Dynasty collection. It’s a huge, traditional round-cut diamond, whose 2.5 cm (1 inch) diameter is equal in size to the visible part of a human eye.

The five diamonds. (Photo: Alrosa)

Discovered in 2015, the rough version of the diamond was a massive 179-carat gem, found in a mine in the northeast region of Sakha. It was then cut and polished into five smaller gems, named after noble families of the imperial era: Sheremetyev, Orlov, Vorontsov and Usupov.

“There was a good reason to choose the name for the collection, which is connected with Alrosa’s intention to revive the traditions and memory of renowned Russian jewelers famous for their craftsmanship and filigree since Russia’s first cutting and polishing factory founded by Peter I (the Great) early in the 18th century,” the company said.

The 179-carat rough diamond that was the source of the Dynasty collection. (Photo: Alrosa)

According to Alrosa, the Dynasty diamond is potentially the most expensive diamond manufactured in the history of Russian jewellery because of its quality.

Alrosa’s decision to produce these polished diamonds and sell them online fits with a broader industry quest to find new ways to the market and add value on the part of gem producers.

Alrosa and Anglo American’s De Beers unit, which for the first time auctioned polished stones this year, produce about half of the world’s rough diamonds.

RELATED TOPICS >> www.www-gems.com

Henry Sapiecha

Lucara sells world’s second-largest diamond for $53 million

The tennis ball-sized Lesedi La Rona rough diamond that Lucara Diamond (TSX:LUC) unearthed two years ago at its Karowe mine in Botswana was sold this week for $53 million.

The buyer, London-based Graff Diamonds, paid nearly $47,777 per carat.

“The stone will tell us its story. It will dictate how it wants to be cut, and we will take the utmost care to respect its exceptional properties,” said the gem’s new custodian, Laurence Graff, in a press release.

On the other hand, Lucara CEO William Lamb stated that Graff paid a fair price for the 1,109-carat diamond, whose discovery marked a defining moment for the Vancouver-based company.

Such finding, he said, “solidified the amazing potential and rareness of the diamonds recovered at the Karowe mine. We took our time to find a buyer who would take the diamond through its next stage of evolution.”

Henry Sapiecha

World’s ‘most beautiful diamond’ to go under the hammer at Christies Auction House

Diamond necklace featuring 163-carat flawless emerald stone, largest of its kind ever to be put up for an auction, has been unveiled in Hong Kong on Thursday September 28 (PRNewsfoto/de GRISOGONO)

An impressive flawless 163-carat diamond that has been hailed the “world’s most beautiful” will go under Christie’s hammer in Geneva in November, the auction house said Thursday.

Discovered in February last year in eastern Angola, the 404.20-carat rough diamond — named the “4 de Fevereiro” — was also the largest found so far in the southern African country, Christie’s said.

www.gem-creations.com

Diamond necklace featuring 163-carat flawless emerald stone, largest of its kind ever to be put up for an auction, has been unveiled in Hong Kong on Thursday September 28 (PRNewsfoto/de GRISOGONO)

A team of ten diamond-cutting specialist were involved polishing the rough diamond during the period of 11 months. The stone was then designed into a one-of-a-kind piece by Swiss jewellery house de Grisogono.

The D-color, emerald-cut diamond is classified as a rare Type IIa one, which in technical terms means an almost complete absence of nitrogen in the stone, de Grisogono said in a separate statement.

The original, 404.20-carat rough diamond that was mined in eastern Angola — the 27th largest rough white diamond ever discovered. (Image courtesy of Christie’s.)

It took over 1,700 hours to create this unique jewel and involved a team of 14 craftsmen and their know-how as well as love for perfection for each detail in the necklace.

he D-color, emerald-cut diamond can be detached from its white gold, diamond and emerald necklace. (Image courtesy of Christie’s.)

The finished piece, named The Art of de Grisogono, allows customers to detach it from its white gold, diamond and emerald necklace, if they wish to do so. It will be shown in London, Dubai and New York before going to auction in Geneva on November 14.

www.www-gems.com

Henry Sapiecha

Diamond Services reports a lowering threshold for synthetic diamonds, as man-made stones as small as 0.0025 cts. discovered in New York

Barely visible on the electronic scale, these tiny single-cut diamonds were discovered by Diamond Services to be laboratory grown.

HONG KONG: JULY 11, 2017 – Multiple single-cut diamonds, sized from a quarter point to half a point (0.0025-0.005 carats), which were contained in jewellery recently submitted for testing to a Diamond Services laboratory, have been found to be synthetic, greatly expanding the range of goods that can be considered at risk of improper and deceptive disclosure.

The jewellery in question was originally submitted to Diamond Services’ laboratory in New York, and after several stones were detected as being potentially laboratory grown. Due to their size, the owner agreed that 11 of them set in eight rings, ranging in size from 0.0025 carats to 0.005 carats, could be removed and sent for full analysis at Diamond Services’ facility in Hong Kong. There they were examined once again with Diamond Services’ award-winning DiamaTest system, which ratified that the diamonds were synthetic, and these findings were confirmed by examination with the DiamondView system of De Beers’ International Institute of Diamond Grading & Research (IIDGR) and Diamond Services Mini Raman Spectrometer.

Usually restricted to smaller-sized stones, single-cut diamonds typically have 17 or 18 facets, and some as few as 16, compared to the standard brilliant round cuts, which are made up of the 57 or 58 facets. Most round stones are first polished as single cuts, and then the additional facets are added. But when small stones are concerned, they are left as single cuts.

“To the best of my knowledge, this is the first time that a synthetic single-cut stone has been detected mounted in jewelry, and it is a credit to our Diamond Services procedures and set of equipment,” said Jospeh Kuzi, Diamond Services founder and managing director. “What this means is that almost no diamond can be taken at face value.”

The source of the single-cut synthetics is not immediately apparent, but Kuzi noted that the growing availability of CVD man-made diamond may prove to be a factor. “CVD is being widely in areas outside the diamond industry, and now includes diamond wafers being gown in laboratories for use in the electronics industry. It could be that waste from these labs and factories end up being processed as very small single-cut diamonds for jewellery,” he said.

Diamonds submitted for synthetic screening at Diamond Services facilities are tested using several systems, including the DiamaTest and Mini Raman Spectrometer, both of which was developed by the company. The latter is the only system currently available that can definitely test rough and polished diamonds, both mounted and un-mounted, without the need to refer them for further testing, accurately detecting whether they are HPHT or CVD lab-grown synthetics within seconds.

Diamond Services, which was established in 2012 in Hong Kong, specializes in development of synthetic diamond detection devices. In 2013 it first introduced the DiamaPen®, a hand-held laser device that is able to detect fancy colour synthetic diamonds. In 2014 it introduced DiamaTest®, an innovative system that screens both loose and colourless diamonds for synthetics, for which it won the prestigious JNA 2014 Award. The Mini Raman Spectrometer was introduced to the market in 2015.

Diamond Services synthetic screening services are currently available at the company’s headquarters in Hong Kong (19F Shing Lee Comm. Bldg., 8 Wing Kut St., Central, Hong Kong, tel: +1-852-2536-4555); and in the United States (15W, 47th St., Suite #1404, New York City, tel: +1-844-842-8122).

www.scamsfakes.com

Henry Sapiecha

Worlds biggest diamond mine Alrosa has sold $2.5 billion in diamonds so far this year 2017

World’s largest diamond producer by output said market has refound its balance.

Russia’s Alrosa (MCX:ALRS), the world’s top diamond producer by output, said Monday it sold $2.5 billion worth of rough and polished precious rocks from January to June this year.2017

From that total, rough diamonds sales totalled $2.442 billion, and polished ones fetched $54.9 million, the company said.

Last month alone, the miner brought in $365 million in diamond sales — $354 million in rough rocks and $10.6 m. in polished ones.

Alrosa Vice President Yury Okoemov said the company considers the seasonal slowdown of June officially at an end, adding the rough diamond market is back to being balanced.

The company, which is planning to increase production by 6% to 39.2 million carats this year, appointed in March Sergei Ivanov, the son of a close advisor to Russian president Vladimir Putin, as its new president.

Henry Sapiecha