Why are Some Diamonds Colored
Image taken on 2008-11-08 21:48:41 by Tillie Ariantho.
The Gemological Institute of America (GIA), the American Gem Society (AGS) and the International Gemological Institute (IGI) are the three best known and most respected of diamond grading laboratories worldwide. Each grading lab have developed a very similar nomenclature for identifying the four Cs of diamonds.
D to Z
Color grading scales used by internationally recognized laboratories (GIA, and GII, for example), ranges from totally colorless (D) to pale yellow or brown (Z). Brown diamonds darker than K color are usually described using their letter grade, and a descriptive phrase, for example M Brown hesitate. Diamonds with more color depth of the fall color A to Z in the range of fancy colored diamonds.
The coloration of diamonds can be caused by several factors. Impurities trapped in diamonds during its formation, the crystal structure of diamond, and exposure to radiation can lead to a range of colors the truth about diamonds.
Yellow Diamonds
The diamonds are yellow due to impurities that are trapped inside diamonds when they are created. If some of the millions of carbon atoms have been replaced by nitrogen atoms, the structure of diamond is not significantly altered, but the clarity will be changed. The amount of color displayed depends on the amount of nitrogen in question.
When you see color because the object of our study reflects a particular wavelength of the light spectrum. A good example is a yellow flower. The flower absorbs all the light the yellow light, resulting in the yellow flower.
Blue Diamond Heart
In the case of a blue diamond of nitrogen has been replaced by boron. Boro reflect the blue wavelength of the light spectrum. The increase of boron concentration on the color should. At level one or a few boron atoms per carbon atom billion, a result of attractive blue color.
Graff Pink Supreme Diamond
The pink diamonds, in shades ranging from pastel pink, as pink to red, deep purple orchid Moussaieff Red Cross, and the price is determined by the intensity of color. Pink diamonds have sold over $ 1,000,000 per carat. Unlike diamonds, type I, who derived their color impurities incorporated into the diamond, pink diamond is considered a type II and the color of a process called plastic deformation.
Type II diamonds have nitrogen impurities little or nothing in them. They get their coloration due to structural anomalies caused by plastic deformation during crystal growth. The intense pressure changes the lattice structure of diamonds and led to the formation of Pink, and red diamonds.
Green Diamond
A natural diamond coming into contact with a radioactive source at some point during their lifetime causes some diamonds to develop a green color. The time required can be up to a million years or more. Green diamonds of this nature are quite unique.
The most common form of diamonds from the irradiation of alpha particles in compounds of uranium or groundwater seepage. green spots on the surface of diamonds or a thin film can grow on the green diamond skin after exposure to these particles long. Many times, the green color is removed during the process of cutting or carving.
Bombardment by beta and gamma rays colored diamond to a greater depth, and in some rare cases, turn the whole green stone. If heated to the temperature just below 600 degrees Celsius can sometimes cause a diamond to develop a green jingle. Higher temperatures can turn the color of a stone less desirable yellow or brown.
Black diamond
Black diamonds are found only in Brazil and the Central African Republic. Approximately 600 tons of conventional diamonds have been undermined, sold, polished since 1900. But not just a black diamond has been discovered in the minefields in the world. The geological settings where diamonds are found or extracts are virtually identical with one exception, the Black Diamond.
Black diamonds have been found in trace elements of nitrogen and hydrogen. The study of 2006 analyzed the hydrogen black diamond tools to infrared detection and found that the quantity indicated that the minerals formed in a supernova explosion before the formation of the solar system. Those diamonds were formed by carbon-rich cosmic dust into an environment similar to carbon stars. The diamonds were incorporated into solid bodies that subsequently fell to Earth as a meteorite.
{description}
