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The Facts About Blue Diamonds

By: David Cowley

Diamonds are composed of carbon atoms that have been subject to extreme pressure and heat. If the diamond contains no impurities then the color will be crystal clear. Nature rarely creates anything that does not have any impurities in it. Most diamonds will contain some amounts of nitrogen atoms. If a few of the millions of carbon atoms have been replaced by nitrogen atoms, then structure of the diamond will not be significantly altered but the clarity will be changed.
When sunlight, which contains all colors, passes thought a diamond some of the light waves will be reflected by the nitrogen. The amount of color displayed is dependent on the amount of nitrogen involved. When we see color it is because the object we are looking at reflected a specific wavelength of the light spectrum. A good example of this is a pair of blue jeans. The jeans absorb all of the light except the blue light, which is reflected by the jeans.
In the case of a blue colored diamond some of the nitrogen has been replaced by Boron. Boron will reflect the blue wavelength of the light spectrum. The higher the concentration of boron the more color will be showed. At a level of one or a few boron atoms for every million-carbon atom, an attractive blue color results. Natural diamonds of this color are rare and highly priced, such as the Hope diamond. The Gemological Institute of America (GIA) has developed a color chart for grading diamonds.
GIA Color Chart.
D, E, F = Colorless
K, L, M = Faint Color
N, O, P, Q, R = Very Faint Color
S through Z = Light Color
Colored diamonds are very rare and very expensive. The Blue diamond is one of the rarest, and in my option the most desirable of the colored diamonds. The Hope diamond, which can be viewed in the Smithsonian Institution in Washington D.C., is the most famous blue diamond in the world, and at 45.52 carats the largest.
The Hope Diamond is more than a billion years old and it is the worlds' largest deep blue diamond. It was first found in Golconda, India in the early 1600s and has had a very checkered pasted ever since. It has crossed oceans and continents many times, has been owned by Kings and Commoners, has been stolen and recovered, sold and resold, cut and re-cut.
Famous Blue Diamonds are valuable investments and include such stones as The Queen of Holland, The Blue Empress, and The Regent Diamond. There are very few blue diamonds and the owners rarely sell these because of their value. The blue stones that are famous come in a wide range of hues. There are at least six different shades of blue in the diamonds that have become famous. The shade of the diamond is usually a matter of preference for those looking for special colors in the diamonds that they buy.
The famous blue diamonds come in different shapes including pear shaped and octagon shaped. The cut of these valuable gems is especially important for large, colored stones and the cut must enhance the natural beauty of these wonderful gems. Sometimes the largest stones that are found with a blue color are studied extensively before any cutting is begun.

Article Source: http://www.gcyarticles.com

David Cowley has created numerous articles on Diamonds. He has also created a Web Site dedicated to Diamonds. Visit www.diamonds-team.com

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