Green Diamonds
Diamonds comes in various colors, however they are very rare. It takes a combination of physical conditions in the formation of diamonds that make a diamond a colored one. Examples of the physical conditions and elements that affect a diamond’s color are radiation, pressure, interaction of elements, etc. The timing and presence of these conditions do not happen regularly hence the rarity and scarcity of colored diamonds.
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Naturally colored diamonds come in yellow, green, black, pink, orange, white, brown, red, blue, olive, grey and purple. These colors are known as the “Primary Colors of Diamonds”. Colored diamonds are valued based on the strength of their color. Very light or faint colored diamonds are more affordable as compared to vivid and very intense diamonds. Therefore, the strength of a diamond’s color is a key factor in appraising its value.
So else how are colored diamonds evaluated? Here are a few tips from the Gemological Institute of American and the International Gemological Institute to guide you when looking at and purchasing colored diamonds, particularly green diamonds.
These diamond experts look at diamonds from the “face up” or from the top of the diamond. From here, they look at the dominant color of the diamond. There will be times that a stone will have other tints present. However, a purely primary colored stone is most favored. They also look at the diamond’s color tone. This pertains to the lightness or darkness of the stone. Color saturation is the third aspect that they look at, and this pertains to the strength and intensity of the main color. The most valued colored diamonds are those that are vivid and intense.
Going back to the formation of colored diamonds, what exactly are these physical conditions and elements that bring about their unique colors? In the case of yellow and orange diamonds, it is the presence of nitrogen during the formation of the diamond that makes it such. Meanwhile, when boron is present in the formation of a diamond, it turns blue. Hydrogen exposure results in violet or purple diamonds. If there is a large amount of pressure in the earth’s center during the formation of the diamond, a red, pink or purple or brown diamond will surface.
But the most unique colored diamond is perhaps the green diamond. What makes green diamonds unique is that they obtain their color already after they are formed. When these colorless diamonds are exposed to irradiated particles over a long period of time, they become naturally green.
According to experts, the most common form of irradiation is from alpha particles that are found in uranium compounds or from percolating ground water. In these cases, only a thin film of green or green spots on the diamond’s surface will result. However, it is the bombardment of beta and gamma rays that will make a colorless diamond entirely green.
Among the famous green diamonds to date is the Dresden Green Diamond. This stone weighs forty-one carats. This natural green diamond was named after Dresden, the capital of Saxony in Germany.