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WILLS Gemstone Knowledge [One-minute interpretation • GIA colored diamond color grading]

WILLS Gemstone Knowledge [One-minute interpretation • GIA colored diamond color grading]


Colored diamond grading is always confusing. How should fans interpret it? WILLS JEWELLERY will give you an in-depth understanding of the color grading of colored diamonds, and learn how to distinguish different color systems in one minute! Gemstone authentication, such as GIA’s 4C criteria, is a grading index that is familiar to all diamond fans. It not only provides an objective evaluation of the appearance of a diamond, but also has a decisive impact on its value. However, in the country of colored diamonds, the grading of Color in 4C shows a "three-dimensional" form, which is completely different from the "linear DZ" grading of white diamonds. The three-dimensional indicators of colored diamonds should include: Hue , Tone , and Saturation .

GIA Colored Diamond Certificate Sample

Hue (Hue) represents the main color and secondary color contained in a colored diamond. For example, a pink diamond with brown color will be called Brownish Pink, with the secondary color in the front and the main color in the back. This kind of color ranking has a very significant impact on the value of colored diamonds. If it is also a brown diamond, and the color ranking becomes Pinkish Brown, it means that the diamond is a brown diamond rather than a pink diamond. Everyone should remember this.

Tone represents the expression of color from light to dark, very light color is called Faint, and very dark color is called Fancy Dark. Note that colored diamonds do not necessarily have a high quality if they are dark in color. If the color is too light or too dark, both the visual appearance and the value of the diamond will be greatly reduced.

Saturation represents the concentration of the color. Only when the color depth reaches the Fancy level, GIA will add the color intensity to the rating range. Don't confuse color intensity with color depth. The former represents the lightness and darkness of the color, and the latter represents the vividness of the color.

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