Gems are available in almost all colors within the spectrum. Many people will think of the main 3, when it comes to colored gems, namely rubies; emeralds and sapphires, but there are a vast array of other valuable stones in a variety of colors and hues. It is possible to find a large amount of color variation within the range of one gem alone. For instance, the sapphire ranges in color from a deep navy blue to a very pale blue shade, based on the source of the gem, that being the actual mine it is removed from. Also, the sapphire, though more commonly blue, may be found in shades of yellow, pink and green!

Generally, the most coveted of these colored gemstones are those possessing the very deepest, vivid and richest shades of the color spectrum. Sapphires for example will be considered most valuable when they are a rich deep blue. The same principal will apply to rubies. Whilst they might range from very pale to the deepest darkest black-red, the most highly-regarded shade is that which is often known as "pigeon's blood". This refers to a deep blood colored red ruby that came from a mine in Myanmar (formerly Burma).

The highest priced emeralds are a certain deep shade of green, although emeralds could be found in a wide range of green, blue and yellow tones. Generally speaking all colored gem stones, or clear gems, rely heavily on the skills of the diamond technician to cut and polish the gem in such a way as to maximize the gems colors, their brilliance and elegance.

It is also a common practice to enhance gems, particularly colored varieties, using particle physics treatment procedures and high heat. This is carried out in a specialist unit and is entirely safe for the wearer of any treated gems. This boosts the color saturation of gems quite substantially.

In general the deep richest colors will provide the most value in the gemstone. The optimum shade for amethysts will be a deep, regal purple. A pale lilac or lavender shade amethyst won't be as valuable.

People, being individuals, tend to choose a wide variation in color and will quite often prefer a very light gem above its more expensive stronger colored version. This has the advantage of being less costly to purchase and gives more variation in gemstone stocks for jewelry. There are far more of the cheaper stones available than the expensive ones. They might not be ideal for investment purposes but they are still all lovely in their own right.

Diamonds however are rated by how clear they are. The less color, the better the grade of diamond. This does not apply certainly to a defined colored diamond such as a strong pink or yellow diamonds. These are just like highly regarded as a pure clarity near-colorless diamond.

Colored diamonds are presently very popular particularly yellow diamond engagement rings due to the association of the color yellow with happiness and joy and there are quite several celebrities sporting yellow diamond rings. Paris Hilton and Victoria Beckham are famous fans of this colored gem and Jenifer Lopez was a fan of the pink variety when engaged to Ben Affleck.

The Cultured Diamonds
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The Man Made Diamonds - Seductive Obsession
At the beginning of the 20th century, a man called Henri Moissan won the Nobel Prize in Chemistry and that was the first step through the man made diamonds' creation. Moissan had discovered a method to crystallize carbon and so to create diamonds.

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