Oldest diamonds discovered in the world

Geology - In Australia, researchers have found diamonds, which are
more than four billion years old, making it only slightly younger than
the Earth itself as jewelry are not good are the microscopically small
stones. Nevertheless, they are very valuable for the research because
they allow conclusions about the early history of the earth.
Seven million years could be measuring wrong, but something like a
huge uncertainty, disappears in the face of the dimensions at issue
here: 4.252 billion years old are the diamonds, the researchers at the
University of Muenster have been excavated in Australia. "We have
worked with the diamond carbon, the oldest relic in hand," said the
mineralogist Thorsten Geisler. Carbon is a basic building block of
life.
Report their find Geisler and his collaborator Martina Menneken in the
British science journal "Nature" (vol. 448, p. 917). Although diamonds
can not be dated directly, but these pieces of jewelry from the early
history of the earth in the mineral zircon included. And the age of
zircons can be determined absolutely.

diamond mining equipment for west sahara

Rich deposits

Commodity discoveries in Western Sahara

22nd August 2011 18:10

Diamonds and gold complicate simmering conflict

Rabat / Granada - Rich deposits of diamonds, gold, uranium, copper, nickel, zinc, lead and cobalt were discovered by Metalex Ventures Canadian mining companies in the Western Sahara occupied by Morocco. Mainly in the controlled by the Polisario Front independence movement, Democratic Republic of Western Sahara as well as in border regions of Mauritania. Morocco is located in the state for decades in conflict with the Polisario Front.

In 2005, the Canadian Government of Morocco had been entrusted with the search. Over four months of flight hours, the Canadians will still need to create a space of more than 17,000 square kilometers in the air to map by means of magnetic and radiological measurements.

A 2.6 billion years old crater of an extinct volcano to contain kimberlite diamonds and gold mine of Tasiast (Mauritania), 21 million ounces of precious metal. The also will need diamond mining equipment to mine in that area.

Diamonds and uranium production in Namibia is collapsing

Substantial investment required
Diamonds and uranium production in Namibia is collapsing
Written by Editor • 31 August 2011 • Print version

The diamond production in Namibia was in the second quarter of this year, more than halved and is now only at 208 000 carats, the expert report of Capricorn Investment Holdings. On average, the production from April to late June, only 45% of the emissions of the same quarter of 2010 had amounted. This was the lowest production level since the first quarter of 2009, it said.

In the past two years is the diamond production fell substantially, mainly due to lower demand resulting from the recession of 2008. According Capricorn Namibia will also soon reach the maximum production potential. A problem for diamonds for sale in NamibiaTo prevent this significant investment in technology and infrastructure are necessary, the mining companies had not been assured.

Why diamonds can be ground at all
29. November 2010, 17:28 Why can not at all polished diamonds have now scientists from the Fraunhofer Institute for Mechanics of Materials IWM in Freiburg found.
Researchers decipher atomic mechanism of the diamond processing: A "glass-like carbon phase" makes it possible
Freiburg - It is the hardest material in the world, and yet can grind diamond itself. Already 600 years ago were first diamond cut and the precious stones were quick to most expensive jewelry, and later became indispensable industrial tool. Now a team led by Lars Pastewka and Michael Moseler from the Fraunhofer Institute for Mechanics of Materials IWM in Freiburg has revealed the secret of why diamond can work at all.
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The research findings represent a major step in tribology, ie the friction and wear research, which is now understood despite its importance for the industry to its scientific basis is still largely.

For centuries, diamonds are cut by skilled craftsmen in a Cast iron wheel, which is peppered with fine diamond chips and fast, with tip speeds of about 30 meters per second, rotating. At the sound of the grinding wheel and with their proverbial tact recognized by experienced diamond cutter, like they have to keep the diamond in the rough to smooth it and to get a polished surface before they can enter the diamond trade for sale. .

Diamond monopoly Alrosa recorded about 75 million euro net profit

Tuesday, 08/10/2010
The Russian diamond producer Alrosa has booked in the first half of 2010 net income of 2.959 billion rubles (more than 75 million euros).
Moscow (RIA Novosti) - As the company announced on Tuesday, has the receipts in the first six months, according to Russian accounting standards to 13.412 billion rubles (about € 339 million) has almost quadrupled. Over the space of the previous year's Alrosa had yet to lose out from 14.675 billion rubles.
 Alrosa is specialized in exploration, production and sales of rough diamonds and in the production of

Diamond Material

DIAMOND. A highly transparent and exceedingly hard crystalline
stone of almost pure carbon, 99% of the isotope carbon 12. When pure,
it is colorless, but it often shows tints of white, gray, blue, yellow, or
green. It is the hardest known substance and is 10 on the Mohs hardness
scale. But the Mohs scale is only an approximation, and the
hardness of the diamond ranges from Knoop 5,500 to 7,000 compared
with 2,670 to 2,940 for boron carbide, which has a Mohs hardness of 9.
The diamond always occurs in crystals in the cubic system and has
a specific gravity of 3.521 and a refractive index of 2.417. Carbon is
normally quadrivalent in flat planes, but in the diamond the carbon
atoms are arranged in face-centered lattices forming interlocking
tetrahedrons and also hexagonal rings in each cleavage plane.
The diamond has been valued since ancient times as a gemstone,
but it is used extensively as an abrasive, for cutting tools, and for
dies for drawing wire. These industrial diamonds are diamonds
that are too hard or too radial-grained for good jewel cutting. Jewel
diamonds have the formation in regular layers, while industrial
diamonds are grown in all directions. Technically these are called
feinig and naetig. Ballas diamonds, valued for industrial drilling,
are formed with the crystallization starting from one central point.
The stones thus formed do not crack in the tool as easily as those with
layer formation. Stones for diamond dies are examined in polarized
light to determine the presence of internal stresses. They are then
drilled normal to the rhombic dodecahedron plane with cleavage
planes parallel to the die-hole axis to obtain the greatest die-service
life. The stones for industrial purposes are also the fragments and the
so-called bort which consists of the cull stones from the gem industry
including stones of radiating crystallization that will not polish well.
Bort also includes a cryptocrystalline variety of diamond in brown,
gray, or black, known as black diamonds, carbonados, or carbons,
found in Brazil in association with gem diamonds. The carbons have
no cleavage planes, are compact, and thus offer greater resistance to
breaking forces. The carbons vary greatly in quality and hardness.
Some rare natural diamonds of South America contain small amounts
of aluminum and other elements which give stability to the crystal
above the normal disintegrating temperature. These diamonds are
not suitable as gemstones but are efficient semiconductors.

From the diamond materials handbook please purchase, if you'd like to read more

platinum diamond earrings

These classic diamond stud earrings are a timeless gift. They feature round-cut diamonds with a total carat weight of 1 carat. The diamonds are mounted in a four-prong setting on platinum posts for pierced ears. The posts are threaded, and the rounded backings screw on for a comfortable and secure fit.
These are exceptional quality diamonds. With a minimum G-H color rating, they are in the upper-most range of near-colorless and appear dazzling white to the eye. They have a minimum clarity of VS2, meaning there are very small