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Home> Education Center > 4 C's > Diamond Color

 

Diamond color is one of the most important factors to consider, as it is noticeable to the "naked" eye. A diamond's color is graded by GIA on an alphabetical scale from D-Z, with D being absolutely colorless and Z being light yellow. Beyond "Z", a diamond is considered to be a "Fancy" color. Although many diamonds appear to be colorless, the many of them have at least a hint of body color.

GIA and AGS Color Grading Scale

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Diamond color has a significant impact on its value. To ensure the highest quality diamonds for your selection Diamond Buy carries diamonds in the color range from D-K only. When buying a diamond, take into consideration that it is often very difficult to detect the difference between a colorless diamond (D-F) and a near colorless diamond (G-J), especially when it is mounted in jewelry. Diamonds with a K-Z color grade usually have yellow shading that can be detected by the naked eye, however, a well cut stone with good proportions will still release the brilliance and fire of a lower colored diamond, dispersing light in such a way so as to create a beautiful stone.

The Impact of Fluorescence
Fluorescence is not directly related to a diamond's color. This separate characteristic refers to the diamond's ability to fluoresce under ultraviolet (UV) light. Our sun emits some UV light, but it is usually not great enough to detect fluorescence. When exposed to UV light, many diamonds will give off a distinctive glowing blue coloration. Although fluorescence may be displayed in various colors, blue is the most common in diamonds. The fluorescence of a diamond is defined by its intensity as either None, Faint, Medium, Strong, or Very Strong. Although fluorescence is a characteristic that can be measured, it is rarely an issue when selecting a diamond and is usually not detectable to the eye.

The impact of fluorescence on price depends on its noticeability. Faint fluorescence has very little effect on a diamond of any color, and therefore has no effect on value. For some higher color stones (D-G), strong fluorescence may give the stone a milky white appearance, which greatly lowers value. Fluorescence often adds value to lower color stones, such as I and lower, as it gives the stones a whiter, brighter appearance.

 

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