Diamond color grading tools

Every Lumera Diamond has been assigned a color grade by the GIA in a viewing environment specially designed to eliminate color from surrounding surfaces as well as the light source itself. This allows the color of the diamond to be accurately measured. Minor differences in diamond color detected in this environment are very difficult if not impossible to detect in a normal environment.

The diamond industry has adopted the GIA diamond color scale; almost every diamond sold today is rated using the GIA color scale, whether it was actually certified by the GIA or not.

All D-Z diamonds are considered white, even though they contain varying degrees of color. True fancy colored diamonds such as yellows, pinks, and blues are graded on a separate color scale.

Below is the GIA diamond color chart with definitions, accompanied by further explanatory comments from Lumera:. The photo below shows a master set used by gemologists to grade color in diamonds. Each diamond to be graded is compared to the master set to determine where it should fall on the diamond color scale.

The colors you see below are slightly exaggerated, since viewing diamonds face down makes their body color more pronounced. The face down orientation makes the detection of body color easier because brightness and fire are minimized when the diamond is face down. Color becomes much harder to detect once a stone is set in a ring and placed in an environment that contains color as opposed to the all white background used in diamond color grading.

For instance, an H color diamond may look as colorless as a D when set in a ring under normal lighting conditions, especially if the two are not compared side by side. Read more about our Diamond Cut Score. StoneAlgo shows live diamond price charts for every diamond we have ever had in our database, showing the price that diamond was listed for at the jewelers we work with.

Never miss a diamond price change with our custom price alerts. Bookmark any diamond to add it to your vault so you can easily add notes, track prices, and manage your favorite diamonds. Certain diamond color grades pair well with faint or medium fluorescence and our experts will let you know if your diamond exhibits the perfect combination of color and fluorescence grade.

The world's largest diamond marketplace. All rights reserved. Vault Log in. Log In. And this is terminology your jeweler will use when talking about diamond color and value. In this post, you can learn about and download the official GIA Color Scale, work with an interactive diamond color chart to see the relationship between grades and colors, and watch a useful GIA Diamond Color Grading video to see how GIA evaluates diamond color.

The GIA scale begins with the letter D, representing colorlessness, and continues with increasing presence of color to the letter Z, representing light yellow, light brown or light gray. With diamonds, color distinctions are so subtle that they are often not noticeable to the untrained eye. That said, these seemingly subtle distinctions can significantly affect diamond quality grading, and of course, price.