Diamond color is one of the primary criteria for diamond quality assessment. It refers to the inherent color or colorlessness of a diamond. Most diamonds appear transparent and colorless, but may actually have subtle yellow or brown tints. Color affects a diamond's optical quality and market value, making it a crucial consideration when authenticating a diamond.
Diamond color grading system
The most commonly used diamond color grading system internationally is the one developed by GIA (Gemological Institute of America), which is divided into grades from D to Z, representing the transition of diamonds from completely colorless to the darkest color:
DF: Colorless
Completely colorless, the rarest and most expensive color grade.
- D: Completely colorless, the highest level.
- EF: A very slight tint, detectable only by a qualified appraiser.
- GJ: Near Colorless
The color is barely noticeable to the naked eye, but it is slightly less expensive than colorless diamonds.
- GH: It still looks like colorless, which is very popular.
- IJ: Has a very slight yellow or warm tint, but not noticeable in the inlay.
- KM: Faint Color**
The color is more obvious, with a slight yellow or brown hue visible, and the price is more affordable.
- NZ: Very Light to Light Color
The color is distinct and not usually seen in high-end jewelry.
Diamond color selection suggestions
- High Grade Color (DF):
Suitable for consumers who value colorless effects and pursue ultimate quality, especially for larger diamonds where color differences are more easily noticed.
- Medium Grade Color (GJ):
This is the most cost-effective range, almost indistinguishable to the naked eye, and suitable for most consumers.
- Lower grade colors (KM or below):
If the diamond’s color is paired with a yellow gold setting, the yellow tint may not be noticeable, making it suitable for buyers on a budget.
Fancy Color Diamonds
In addition to GIA's DZ colorless diamond grade, there are also special colored diamonds, such as pink, blue, green, etc. These are called Fancy Color Diamonds, which have an independent evaluation system and are usually much more expensive than colorless diamonds due to their rarity.
In summary, diamond color is one of the important criteria for measuring its beauty and value, but whether to choose a high-grade color needs to be decided based on personal budget and needs.
