De Beers Top No. 1 Diamond Miner Agrees Refinancing

As diamond demand begins to return and prices to recover, De Beers is upbeat on its debt position as it agrees refinancing terms and sets up right issue.

LONDON (Reuters) –

Top diamond miner De Beers is upbeat about cash flow after slashing costs by half and is making progress on shoring up its balance sheet after agreeing refinancing terms.

The group — 45 percent-owned by mining group Anglo American — said on Friday it was moving forward on refinancing a $1.5 billion debt facility and a rights issue of up to $1 billion announced last month.

“We’ve agreed a set of terms with our international lenders,” David Prager, director of communications, told Reuters. “That process will come to a conclusion over the next several weeks. We’re feeling very good about it.”

Once the refinancing process is concluded, shareholders will commit funding to help recapitalise the business through the rights issue, he added. Continue reading

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January 29, 2010 Posted by | Money & Fund, News of Diamond | 2 Comments

Can Diamonds Survive A Free Market?

Thursday, August 06, 2009, Edward Jay Epstein

Despite its celebrated slogan “Diamonds Are Forever,” De Beers, which has dominated the diamond business for over a century, is discovering that diamond profits are not forever.

It reported in July that its profits for the first half of 2009 fell by no less than 99%. The problem is not that the mining giant is running out of diamonds. Its highly-efficient diamond mines in South Africa, Botswana and Namibia still supply about 40 percent of the world’s gem-sized diamonds. Nor have diamonds lost their value. They not only remain a vital part of the engagement ritual but their retail price of engagement rings has actually risen in 2009.

What is killing De Beer’s profits is the prohibitive cost of running a cartel. The cartel arrangement is necessary to sustain the illusion that diamonds are rare. Continue reading

January 21, 2010 Posted by | News of Diamond, Too Good to Archive | 1 Comment

Berlian Dan Pemakaiannya Bagi Manusia

Teknologi Zaman Keemasan
Pemakaian Permata Dapat Bermanfaat Bagi Manusia
Oleh Saudari-inisiat Chio, San Jose, California, Amerika Serikat
(Asal dalam Bahasa Inggris)

Catatan paling awal tentang berlian ditemukan dalam Arthasastra, sebuah risalah kuno India berbahasa Sansekerta tentang perekonomian yang ditulis sekitar abad ke-4 SM. Pada abad ke-6, berlian telah dikenal sebagai batu mulia yang bisa menggores batu mulia mana pun dan bahkan bisa menggores batu delima. Berlian dapat menggores apa pun, tetapi tidak bisa digores oleh apa pun. Setelah abad ke-18, dengan meningkatnya permintaan, pencarian berlian meluas hingga ke Brasil, Afrika Selatan, Kanada, dan Australia.

Para ilmuwan modern mengakui bahwa berlian merupakan salah satu bahan yang paling keras di bumi ini dan juga paling lamban terhadap reaksi kimia (tidak reaktif). Berlian juga sangat awet dan memiliki koefisien gesek yang rendah (benda lain dapat melewatinya dengan mudah). Berlian juga stabil pada suhu dan tekanan yang tinggi sekali. Sejumlah besar gelombang cahaya dapat menembusnya, mulai dari ultraviolet hingga inframerah dalam spektrum elektromagnetik. Continue reading

January 12, 2010 Posted by | Learn Diamond, News of Diamond, Too Good to Archive | Leave a comment

Natural Champagne Colored Diamonds in Jewelry

http://www.champagnediamondcenter.com/about_champagne.asp

Beautiful, naturally
Champagne diamonds are the most exotic, fashionable and alluring of natural color diamonds. Champagne diamonds are the most exotic, fashionable and alluring of natural colored diamonds. With soft, radiant tones, and exquisite shades from light champagne to deep, rich cognac and brown, champagne diamonds radiate natural warmth, sophistication and beauty that make them the perfect accompaniment to one’s personal style.

The perfect gem for all occasions Continue reading

January 12, 2010 Posted by | Buying Diamond ?, Learn Diamond, News of Diamond | Leave a comment

Boron is Harder Than Diamond

by : Philip Ball

You don’t often break a diamond. So when in 2003 Dave Mao cracked a tooth of his diamond anvil, he knew something extraordinary must have happened. Together with his daughter Wendy and other colleagues at the Geophysical Laboratory of the Carnegie Institution for Science in Washington DC, he was using the device to test materials at pressures many millions of times higher than those at the Earth’s surface – higher even than in our planet’s core – by squeezing them between two tiny diamond jaws.

Behind the glitz, diamond is just a form of carbon. It is, however, by common consent the hardest material known. The substance in the Maos’ test cell had also begun as pure carbon. It was plain old graphite – the soft, slippery stuff that is used for pencil leads and lubricants. Clearly, something had happened in the anvil cell to make it awesomely hard. Continue reading

January 12, 2010 Posted by | Learn Diamond, News of Diamond | Leave a comment

Other Diamonds Color

Virtually every color, shade and hue the mind can imagine, nature has created within a marvelous natural color diamond…most now available for our pleasure, some still lying silently awaiting discovery. The range of color varieties is almost inexhaustible but NCDIA is committed to present, on a continuing basis, the full range of color categories expressed by these wonderful natural creations. Be sure to revisit us here on a regular basis to see new additions as they are revealed.

Green Diamond

Pure green diamonds are very rare since their natural green color comes from exposure to irradiated particles over eons of time. With perhaps only one new green being introduced to the market each year pure green stones are more highly valued than the yellowish green or green-yellows. Continue reading

January 10, 2010 Posted by | Learn Diamond, News of Diamond | Leave a comment

History of Yellow Diamond

Yellow Diamond History

In the late 1800s, a large yellow diamond vein was found in South Africa’s Cape Province.  The diamonds discovered in this unique discovery were predominately light yellow in color.  These diamonds quickly became known as “Cape” diamonds, named after their geographical origin.  At the time, yellow Cape diamonds were unusual and unique from more common colorless stones found in India and Brazil.

Today, yellow diamonds are more common than they were back in the late 1800s.  However, only one diamond in every ten thousand diamonds is a color diamond.  One of the colors growing in interest among consumers is yellows.  All light-yellow diamonds are called Cape diamonds regardless of their origin.

Gemological laboratories often refer to intense or vivid yellow diamonds as “Canary” yellow.  Canary yellow diamonds are very rare when compared to more common “Cape” diamonds.  Canary diamonds contain much more nitrogen, but their color is more of a gold color.

January 4, 2010 Posted by | News of Diamond | Leave a comment

Top 10 most Expensive Gemstones

A gemstone is a mineral in a natural crystalline form of a mineral. The rarity, the color, the size, the hardness, and the transparency of a gemstone depending entirely on its chemical components. Nature has offered us breathtaking gemstones which are desirable for their amazing beauty all over the world.

The rarity, durability and value of these gemstones make them a remarkable asset that can be enjoyed for generations. colored gems Gemstones don’t cease to amaze. Related to their beauty and rarity is also the wealth statement of the wearer. For thousands of years humans have been adorning themselves with gems and jewels to stand out and wow an audience.

Precious Gemstones vs. Semi Precious Gemstones

Precious gemstones are typically rarer, and therefore more expensive, than semi precious gemstones. Precious gemstones include diamonds, rubies, sapphires and emeralds. Although pearls are technically not considered gemstones since they are formed organically, some consider them to be the equivalent of precious gems, especially when they are quality South Sea or Tahitian pearls.Sapphire ring

Semi Precious gemstones are comprised of the remainder of gems, including amethyst, citrine, garnet, topaz, morganite, peridot, opal, jade and coral. These are typically less expensive than precious stones because they are more readily available, although there are definitely exceptions to the rule. Rare versions of semi precious stones, such as Mandarin garnet or a fine specimen of Alexandrite, can cost just as much if not more than a precious stone. Much of a gemstone’s price depends on size and quality, as well as the distinction of precious versus semi-precious.

General Price Tiers of Gemstones

To give you a general idea of the heirarchy of gemstone pricing, we’ve broken the most common gemstones out into three tiers: Most Expensive, Mid-Range and Affordable:

Most Expensive Gemstones: Diamond, Emerald, Sapphire, Ruby and Tanzanite

Mid-Range Gemstones: Aquamarine, Morganite, Peridot

Affordable Gemstones: Amethyst, Citrine, Garnet, Topaz

Top Ten

Whether we are talking about necklaces, rings, pendants, or bracelets, the precious and rare gems – mounted on jewelry – have long since become one of the favored ways to express just how much wealth one has. Here are the ten rarest and most expensive, of course, gems on earth:

Jadeite – over USD $3 Million/Carat

Red Diamonds – about USD $2-2.5 Million/Carat

Serendibite – about USD $1.8-2 Million/Carat

Blue Garnet – about USD $1.5 Million/Carat

Painite – about USD $50-60,000/Carat

Grandidierite – about USD $50,000/ Carat

Musgravite – about USD $35,000/Carat

Red Beryl Emerald – about USD $10,000.00/Carat

Black Opal – about USD $2,355/Carat

Jeremejevite – about USD $2000/Carat

Source Idea :
Gemstone Collection from Apples of Gold
jewelrybloguncovered.com

January 4, 2010 Posted by | 'Eager to Know' Stories, Buying Diamond ?, Close to Jewelry, News of Diamond | 1 Comment

Berlian Seumur Bumi Ditemukan Di Australia


SM/afp BERLIAN MENTAH:Seorang pria memegang berlian mentah di bagian Emas dan Berlian Bank Sentral Sierra Leone di Freetown, 10 Agustus lalu.(26)

Sejumlah berlian berumur lebih dari empat miliar tahun, nyaris setua usia Bumi, ditemukan di Australia Barat. Temuan itu bakal bermanfaat bagi para ilmuwan untuk menguak petunjuk penting mengenai sejarah awal planet Bumi.

Berlian-berlian itu ditemukan di kawasan perbukitan Jack Hills dalam keadaan terbungkus batuan kristal zircon. Berlian kecil itu adalah temuan batuan tertua yang terdapat dalam perut bumi. Keberadaan berlian itu menandakan, proses pendinginan Bumi sejak ledakan besar (Big Bang) mungkin lebih cepat dari perkiraan semula.

Waktu antara terciptanya Bumi sekitar 4,5 miliar tahun yang lalu dan terbentuknya batuan karang sekitar 500 juta tahun kemudian dikenal sebagai periode Hadean, atau “abad” geologi.

Para geolog sampai kini masih berpendapat, periode itu adalah saat ketika permukaan planet masih berupa massa lelehan lava. Namun, temuan berlian tersebut membuktikan yang sebaliknya. Temuan berlian itu dipaparkan dalam jurnal Nature.

Ketua tim peneliti Martina Menneken dari Westfalische Wilhelms-Universitat Muenster, Jerman, mengatakan keberadaan berlian itu membuktikan bahwa ada lapisan tebal yang relatif keras pada masa 4,25 miliar tahun lalu. Lapisan bumi itu tercipta pada kondisi tekanan kuat terhadap permukaan planet.

Bisa disimpulkan, pendinginan permukaan bumi mungkin hanya butuh waktu sekitar 200 tahun. Kondisi temperatur itulah yang memungkinkan air dan samudera terbentuk.

“Temuan itu menunjukkan, planet sudah mendingin dan membentuk lapisan batuan lebih awal dari dugaan semula,” kata Alexander Nemchin, pakar geokimia pada Curtin University of Technology Australia,

“Jack Hills adalah satu-satunya tempat di Bumi yang mempunyai informasi mengenai terbentuknya Bumi. Berlian itu adalah batuan tertua di planet ini,” kata dia.

Hasil uji peluruhan radioaktif memperlihatkan, usia kristal-kristal dari Australia Barat bervariasi antara 3,06 miliar tahun hingga 4,25 miliar tahun.(rtr-gn-25)

sumber : http://www.suaramerdeka.com

January 4, 2010 Posted by | Learn Diamond, News of Diamond | Leave a comment

Largest diamond in galaxy predicts future of solar system

Largest diamond in galaxy predicts future of solar system

Largest diamond planet in galaxy predicts future of solar system

Astronomers discovered the largest diamond of all times in space. The weight of the precious stone reportedly makes up ten billion trillion trillion carats or five million trillion trillion pounds).

The space diamond is virtually an enormous chunk of crystallized carbon, 4,000 kilometers in diameter. The stone is located at a distance of 50 light years from Earth, in the Constellation Centaurus.

Scientists believe that the diamond is the heart of an extinct star that used to shine like the Sun. Astronomers have already dubbed the space diamond as Lucy in a tribute to the Beatles song ‘Lucy In The Sky With Diamonds.’

“You would need a jeweler’s loupe the size of the Sun to grade this diamond!” says astronomer Travis Metcalfe (Harvard-Smithsonian Center for Astrophysics), who leads a team of researchers that discovered the giant gem.

The cosmic stone completely outclasses all diamonds that have ever been found on Earth. The largest diamond weighing 546 carats was found in South African Republic. The diamond, The Star of Africa, resides in the Crown Jewels of England. The Star of Africa was cut from the largest diamond ever found on Earth, a 3,100-carat gem.

Lucy, also known as BPM 37093, is actually a crystallized white dwarf. A white dwarf is the hot core of a star, left over after the star uses up its nuclear fuel and dies. It is made mostly of carbon and is coated by a thin layer of hydrogen and helium gases.

The white dwarf is not only radiant but also harmonious. It rings like a gigantic gong, undergoing constant pulsations. “By measuring those pulsations, we were able to study the hidden interior of the white dwarf, just like seismograph measurements of earthquakes allow geologists to study the interior of the Earth. We figured out that the carbon interior of this white dwarf has solidified to form the galaxy’s largest diamond,” says Metcalfe.

Astronomers say that our Sun will die in five billion years and become a white dwarf too. About two billion years after it will turn into a similar diamond that will continue to sparkle in the center of the solar system forever.

Strana.ru

Translated by Dmitry Sudakov
Pravda.ru

December 25, 2009 Posted by | News of Diamond | 1 Comment

   

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