Many people prefer colorful fancy diamonds over traditional clear or white diamonds. Some diamonds retain their natural color when mined, others are colored by gemologists and jewelers during the manufacturing process. To make them more accessible to the average consumer, companies have begun coloring lower quality diamonds to transform a less desirable yellow or brownish diamond into a beautiful, brightly colored diamond.
Colored diamonds can be treated through a process called irradiation, which uses a high temperature system to change the color of the diamond. The remaining diamonds are treated by painting.
Fancy colored diamonds
Although many diamonds are tested and graded based on their colorlessness, some people prefer fancy colored diamonds that come in bright greens, yellows, reds, pinks, and everything in between. Some colored diamonds are naturally like this. When a diamond contains nitrogen, it often has a yellow hue. If a gemstone has been affected by radiation, it may turn green.
Other colored diamonds have been treated to preserve their color, allowing people on a smaller budget to purchase diamonds in unusual colors. Gemologists have found ways to change the color of diamonds to achieve the desired hue or color.
The grading process for colored diamonds is slightly different than the grading process for clear diamonds. First, a colored diamond is classified by its primary hue, blue, pink or red, which accounts for the majority of the diamond's color. Secondly, they are classified based on color intensity. A diamond with a very intense natural color is rarer than a less intense and therefore more expensive diamond. In most cases, a treated diamond costs less than a natural colored diamond.
Synthetic diamonds
Most diamonds are found and mined by miners, but recently scientists have invented ways to create synthetic diamonds. Although synthetic diamonds are still “real diamonds,” they are created in a laboratory rather than a natural mine.
Names of colored diamonds Because fancy diamonds come in many different shades, it can sometimes be difficult to interpret the diamond's color name. There are often two colors that define the hue of a diamond, such as greenish blue.
Each name has a primary color description and some have a secondary color description. When a diamond is called a “blue diamond,” it can be said that it is a diamond with a shade of blue.When a diamond is called “greenish blue,” you may wonder what that means. Is the diamond blue or green? A color marked “ish” at the end is considered a secondary color and the second color, in this case blue, becomes the primary color. So a greenish-blue diamond is predominantly blue, with green flecks visible throughout the stone. If you come across a diamond marked “Red Brown,” the diamond will have equal amounts of both colors visible through the stone.
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