for a cheap price, it may be too good to be true. High Pressure High Temperature Treatment is now often used to raise the price of brown by transforming them into beautiful clear diamonds. The reasoning behind many company's use of this method is that the were meant to be clear but something prevented it from happening so they are just completing nature s work.
Evaluating Colored Diamonds
The quality of a diamond is based on its color, clarity, cut and carat weight. A diamond s color plays a major part in its value and popularity. White or colorless are the basis in which all other are compared. White are historically more popular than colored but naturally vibrantly colored are growing more popular in recent years. Most have yellowish tints and it is the quality of color that judges their price.
Colored are graded and the amount of color is identified using a lettering system. For example, D is used to describe completely colorless diamonds. D, E and F describes colorless diamonds, G, H, I and J are nearly colorless while K, L and M are slightly tinted with a yellow color. N, O, P, Q, R are lightly tinted with a yellow color while S Z describes which are colored yellow or brown.
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