Diamond - définition. Qu'est-ce que Diamond
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Qu'est-ce (qui) est Diamond - définition

ALLOTROPE OF CARBON OFTEN USED AS A GEMSTONE AND AN ABRASIVE
Diamond industry; Industrial Diamond; Diamonds; The 4 C's Of Diamonds; Industrial diamond; 4-C's of Diamond Grading; Polished diamond; Diamond mining; Daimonds; Mitre-crozier appliqué; Mitre-crozier applique; Type-II diamond; Industrial diamonds; Natural diamond; Diamond powder; Diamonad; Impact diamonds; Diamond trading; Diamond trade; Daimond; Diamond (mineral); Diamond Grader; Natural diamonds; Canadian Diamond Code of Conduct; Fancy Colored Diamonds
  • Theoretically predicted [[phase diagram]] of carbon
  • A [[scalpel]] with synthetic diamond blade
  • Main diamond producing countries
  • brilliant cut]] diamond set in a ring
  • Diamond Balance Scale 0.01 - 25 Carat Jewelers Measuring Tool
  • A diamond knife blade used for cutting ultrathin sections (typically 70 to 350 nm) for transmission [[electron microscopy]]
  • Diamond polisher in Amsterdam
  • Age zones in a diamond.<ref name=DCOdecadal/>
  • Close-up photograph of an [[angle grinder]] blade with tiny diamonds shown embedded in the metal
  • One face of an uncut octahedral diamond, showing trigons (of positive and negative relief) formed by natural chemical etching
  • Diamond unit cell, showing the tetrahedral structure
  • Diavik Mine, on an island in Lac de Gras in northern Canada
  • [[Eclogite]] with centimeter-size [[garnet]] crystals
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  • Extremely rare purple fluorescent diamonds from the Ellendale L-Channel deposit in Australia
  • Gem-cut synthetic silicon carbide set in a ring
  • Brown diamonds at the [[National Museum of Natural History]] in [[Washington, D.C.]]
  • The [[Daria-i-Noor]] Diamond—an example of unusual diamond cut and jewelry arrangement.
  • The most famous colored diamond, the [[Hope Diamond]]
  • [[Siberia]]'s Udachnaya diamond mine
  • [http://en.wikibooks.org/wiki/Development_Cooperation_Handbook/Stories/Unsustainable_Growth Unsustainable diamond mining in Sierra Leone]
  • The extreme hardness of diamond in certain orientations makes it useful in materials science, as in this pyramidal diamond embedded in the working surface of a [[Vickers hardness test]]er.
  • Diagram of a volcanic pipe
  • platforms]], which together constitute cratons.
  • Double diamond discovered in the Ellendale Diamond Field, Western Australia

Diamond         
One of five pedagogical languages based on Markov algorithms, used in "Nonpareil, a Machine Level Machine Independent Language for the Study of Semantics", B. Higman, ULICS Intl Report No ICSI 170, U London (1968). (cf. Brilliant, Nonpareil, Pearl[3], Ruby[2]).
Diamond         
·noun One of a suit of playing cards, stamped with the figure of a diamond.
II. Diamond ·noun The infield; the square space, 90 feet on a side, having the bases at its angles.
III. Diamond ·noun A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.
IV. Diamond ·adj Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.
V. Diamond ·noun The smallest kind of type in English printing, except that called brilliant, which is seldom seen.
VI. Diamond ·noun A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.
VII. Diamond ·noun A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.
diamond         
(diamonds)
1.
A diamond is a hard, bright, precious stone which is clear and colourless. Diamonds are used in jewellery and for cutting very hard substances.
...a pair of diamond earrings.
N-VAR
2.
A diamond is a shape with four straight sides of equal length where the opposite angles are the same, but none of the angles is equal to 90°: ¦.
He formed his hands into the shape of a diamond.
N-COUNT
3.
Diamonds is one of the four suits of cards in a pack of playing cards. Each card in the suit is marked with one or more red symbols in the shape of a diamond.
He drew the seven of diamonds.
N-UNCOUNT-COLL
A diamond is a playing card of this suit.
N-COUNT

Wikipédia

Diamond

Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.

Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, orange, or red. Diamond also has a very high refractive index and a relatively high optical dispersion.

Most natural diamonds have ages between 1 billion and 3.5 billion years. Most were formed at depths between 150 and 250 kilometres (93 and 155 mi) in the Earth's mantle, although a few have come from as deep as 800 kilometres (500 mi). Under high pressure and temperature, carbon-containing fluids dissolved various minerals and replaced them with diamonds. Much more recently (hundreds to tens of million years ago), they were carried to the surface in volcanic eruptions and deposited in igneous rocks known as kimberlites and lamproites.

Synthetic diamonds can be grown from high-purity carbon under high pressures and temperatures or from hydrocarbon gases by chemical vapor deposition (CVD). Imitation diamonds can also be made out of materials such as cubic zirconia and silicon carbide. Natural, synthetic and imitation diamonds are most commonly distinguished using optical techniques or thermal conductivity measurements.

Exemples du corpus de texte pour Diamond
1. She is a diamond bride," said Rajeshree Naik, director of the Diamond Information Center at DeBeers.
2. Alrosa Opens $3.5Bln Diamond Mines Reuters Diamond producer Alrosa has opened new diamond deposits worth $3.5 billion in eastern Siberia, the state–controlled company said Wednesday.
3. In fact, diamond jewelry sets outstrip all other diamond jewelry sales in the Middle East, accounting for more than half of all diamond jewelry sales.
4. The gems, provided by Bulgari, included a 16–carat white gold diamond necklace worth 2.5million, ten–carat diamond earrings and a priceless vintage 1'3' platinum and diamond ring.
5. World diamond supplies From 1'87 to 1''5, the diamond tycoon was a "sightholder" – an exclusive group of about '0 diamond traders – of South African mining giant De Beers, which controls roughly 70% of the world‘s diamond supplies.