ALROSA – Page 30

July, 2017February, 2025

Gem Quality

Only about 20% of mined diamonds are of gem quality, meaning they meet the necessary standards for use in jewellery. The remaining 80% fall into the industrial-grade category, used in various commercial and technological applications. Let’s explore this in more detail:

Breakdown of Diamond Quality
Gem-Quality Diamonds (≈20%)

These diamonds are characterised by high clarity, colour, and cut quality, making them desirable for jewellery.
They undergo cutting and polishing to enhance their brilliance before being set in rings, necklaces, earrings, and other fine jewellery.
Their value depends on the 4 Cs (Carat, Cut, Colour, Clarity) and whether they are natural or treated.
Industrial-Grade Diamonds (≈80%)

These diamonds are lower in clarity, may have visible inclusions, and often exhibit yellow, brown, or grey colours that make them unsuitable for jewellery.
They are used in industries due to their hardness and durability, which are essential for cutting, drilling, grinding, and polishing applications.
Common uses include:
Diamond-tipped drill bits and saw blades for construction and mining.
Abrasive powders for polishing and grinding metals.
High-tech applications, such as semiconductors and heat conductors in electronics.
Why the Low Percentage of Gem-Quality Diamonds?
Several factors contribute to why only a small fraction of mined diamonds qualify as gem-grade:

Formation Conditions: Natural diamonds form under extreme pressure and temperature deep within the Earth’s mantle. Impurities or irregular growth can affect their clarity, colour, or shape.
Inclusions and Blemishes: Many diamonds contain internal inclusions (tiny fractures or foreign minerals) and external blemishes, making them less suitable for jewellery.
Colour and Transparency: Gem-quality diamonds are typically colourless to light yellow (D-Z on the GIA colour scale). Many mined diamonds have a strong brown or grey tint, reducing their desirability.
Cutting Yield: Some rough diamonds, even if of good quality, may be inefficiently shaped for cutting into marketable gemstones.
Impact on the Diamond Market
Rarity Drives Value: Since high-quality diamonds are less common, they retain their value better than industrial-grade diamonds.
Lab-Grown Diamonds: The gap in supply between industrial and gem-quality diamonds has led to advancements in lab-grown diamonds, which can be produced with high clarity and controlled quality.
Recycling & Recutting: Some lower-quality diamonds can be recut or treated (e.g., laser drilling, fracture filling) to enhance their appearance, but these diamonds are usually less valuable than untreated stones.

The fact that only 1 in 5 mined diamonds meets gem-quality standards highlights the rarity and value of fine diamonds. This also influences pricing, sourcing strategies, and market trends, as both natural and lab-grown diamonds compete in the luxury and industrial sectors.

July, 2017March, 2024

If I buy a certified diamond, how do I know that the diamond in my ring is the one described on the diamond certificate or diamond grading report?

There are a number of ways to verify that your diamond matches the diamond certificate it is purchased with. If you purchased a diamond that is laser inscribed, ask your jeweller to show you the laser inscription under magnification. This way, you will always be able to identify the diamond as your own.

DCLA also performs a verification service, for both DCLA certified diamonds and for diamonds certified by other internationally recognised laboratories. Bring or send your diamond, together with the diamond grading certificate, to the DCLA laboratory and the diamond will be conclusively matched against the certificate. DCLA can then cold laser inscribe the diamond with either the diamond grading certificate number, or with a personalised message.

July, 2017March, 2024

How do I know that my diamond certificate or diamond grading report is from an independent laboratory ?

Ask the jeweller if the diamond certificate comes from an independent diamond laboratory or if it produced by a diamond merchant or retailer, then do your research. Make sure the certificate is issued by the DCLA or another highly respected diamond grading laboratory; DCLA is the only diamond grading laboratory worldwide to offer a full-replacement Diamond Grading Guarantee.

Kimberley Diamonds closes its last mine

Controversial Australia-based miner Kimberley Diamonds has put its last remaining diamond mine into administration after it failed to secure fresh funding.

Kimberley, which avoided an estimated $40 million clean-up bill after it walked away from its Ellendale mine in Western Australia’s north, shut its Lerala operation in Botswana last week and placed the subsidiary responsible for the project into administration.

Kimberley said in a statement on its website that its subsidiary Lerala Diamond Mines had “no choice” but to place itself into administration after the parent company was unable to strike a new financing deal.

It had earlier stopped day to day operations at Lerala pending an overhaul of the mine’s diamond processing plant. “The successful completion of this performance improvement plant required further funds to be provided by investors and despite considerable progress being made on implementing these improvements, all of the required funds have not been forthcoming,” Kimberley said. “Kimberley has been in discussions with investors regarding further funds for some time, however to date no agreement for further and sufficient funding has been reached and KDL has been forced to cease providing financial support to Lerala.” But the collapse of Lerala won’t kill off the parent. Kimberley said it remained in discussions with investors for further funding and was “exploring corporate restructuring options”.

Kimberley delisted from the ASX earlier this year after a chequered history. The stock enjoyed a charmed run early on, surging from 11c in 2012 to $1.30 in 2013, but fell spectacularly in 2014 when it revealed it had failed to secure a price increase from global jeweller Tiffany & Co that it had already factored into its profit forecasts. Its shares never recovered, and last traded at just 0.7c prior to its delisting.

The company, chaired by former stockbroker Alexandre Alexander, also came under fire for its handling of the closure of Ellendale. The liquidators appointed to the Kimberley subsidiary that held Ellendale used a legal loophole to shift responsibility for the clean-up to the state government’s industry-funded mining rehabilitation fund.

The rehabilitation costs at Ellendale have been estimated at between $28m and $40m. WA’s new Mines and Petroleum Minister Bill Johnston has flagged an overhaul to prevent “rogue elements” taking advantage of the MRF.

Source: TheAustralian.com.au

De Beers taps into polished diamonds market with first-time auction

Anglo American’s De Beers, the world’s largest rough diamond producer by value, has decided to begin selling its own polished diamonds in auctions for the first time in its history.

The pilot auction, scheduled for June, will include a wide range of polished stones manufactured directly from the company’s own rough diamonds.

“The pilot auction, scheduled for June 29, will include a wide range of polished stones manufactured directly from De Beer’s own rough diamonds.” All the polished rocks will carry grading reports from both the International Institute of Diamond Grading & Research (IIDGR) — De Beers’ in-house grading unit — and the Gemological Institute of America (GIA).

“We are interested in testing the level of demand from polished buyers for diamonds that have a clear and attractive source of origin, and that offer the assurance of product integrity that dual certification provides,” Neil Ventura, the miner’s executive vice president of auction sales, said in the statement.

If successful, the process would provide De Beers with more insight into the polished market, while also helping consumers fill gaps in supply or inventory if they were unable to find goods at the company’s rough auctions, he added.

All registered De Beers auction buyers will be eligible to bid in the first sale, which takes place on June 29.

Source: Mining.com

De Beers Profit Jumps as Diamond Market Stabilises

Profit more than doubled for De Beers last year as trading conditions in the diamond-manufacturing sector improved and inventory levels stabilized.

Underlying earnings jumped to $667 million in 2016 from $258 million a year earlier, parent company Anglo American said in a statement Tuesday. This came as revenue grew 30 percent to 6.07 billion, reflecting a 37-percent hike in rough-diamond sales to $5.6 billion.

The midstream of the diamond industry returned to buying rough after a 2015 slump in demand that resulted from oversupply of polished and inflated rough prices. Manufacturers started working down their polished inventories in the second half of that year before restocking their rough supplies in 2016.

De Beers also lowered prices, with its rough-price index declining 13 percent across 2016. The miner consequently reduced its rough stockpiles during the year, management said. De Beers production fell 5 percent to 27.3 million carats, while sales volume leapt 50 percent to 30 million carats, meaning it sold a larger volume of stones than it mined. “2016 generally was a much better year for the diamond industry,” said Bruce Cleaver, De Beers chief executive officer. “The midstream performed much better than 2015, largely as a result of the strong and decisive action we took in 2015 to reduce production in accordance with demand.

The fruits of that tough action we took in 2015 was seen through 2016.” The company projected production would rise to 31 to 33 million carats in 2017, “because we see the market has recovered from where it was at the end of 2015,” noted Cleaver. The company maintained a conservative outlook for the diamond jewelry market given prevailing global macro-economic conditions and geopolitical risk.

Performance will be dependent on a number of macro issues, including the attitude of the new U.S. administration, the strength of the dollar, continued recovery in China and the impact of Indian demonetization, Cleaver explained. “All other things being equal, we think diamond demand will continue to grow along with GDP growth,” he said. Source: diamonds.net

Bain Capital and Bow Street to acquired Blue Nile

In a surprise announcement, online jeweller Blue Nile has entered into an agreement to be acquired by an investor group managed by Bain Capital Private Equity and Bow Street LLC.

Bain Capital and Bow Street will acquire 100 percent of the outstanding shares of Blue Nile common stock.

The cash deal is valued at $500 million, Blue Nile stockholders will receive $40.75 in cash per share, 34 percent over Blue Nile’s closing price on November 4.

Blue Nile’s board of directors approved the deal unanimously, and recommended that stockholders vote their shares in favour of the transaction.

138.57 Carat D Colour Diamond Recovered by Petra at Cullinan

Petra Diamonds announced that it had recovered a 138.57-carat, Type IIa, D-colour diamond at its historic Cullinan mine near Pretoria in South Africa. The company said the diamond would be offered for sale in Johannesburg later this month.

Lucara Sells Its 813 Carat Diamond for US$63 Million

Lucara Sells Its 813 Carat Diamond for US$63 Million, the Highest Price Ever Achieved for the Sale of a Rough Diamond.

Lucara, is pleased to announce that the exceptional 812.77 carat, Type IIa diamond recovered from the Karowe mine in Botswana in November 2015, has been sold for US$63,111,111 (US$77,649 per carat).

As part of the sale, Lucara has partnered with Nemesis International DMCC, and retains a 10% interest in the net profit received from the sale of the resultant polished diamonds.

The 813 carat diamond has been named, “The Constellation”, in collaboration with our partner. Lucara is a well-positioned diamond producer.

The Company’s main producing asset is the 100% owned Karowe Mine in Botswana.

De Beers cuts rough diamond prices and sight

De Beers which produces thirty percent of world rough diamonds has cut prices by 10 percent for the sight.

This comes after two reductions in its annual production output by 15 percent failed to slow slump in prices of rough.

Rough diamond prices have dropped 14 percent in some categories and are in their fifth consecutive quarterly loss, which is the longest in a decade.

De Beers cut the size of the sight to $250 million and reduced the prices by 9 percent, according to sight holders.

De Beers has also contributed tens of millions to a jewellery advertising campaign. Its advertising campaign will promote diamond jewellery in the U.S. and to Chinese consumers.