Gia Diamond Grading Scale

Internally flawless category if diamonds have no inclusions visible under 10x magnification only small blemishes on the diamond surface.

Gia diamond grading scale.

The gia diamond grading scale is divided into six categories and eleven grades. So the creators of the gia color scale wanted to start fresh without any association with earlier systems. To develop their cut grading system gia performed extensive computer modeling of round brilliant diamonds over a 15 year period and conducted more than 70 000 observations on actual stones to validate the research. This report includes all the important 4cs grading results as the diamond grading report but does not include the plotted diagram.

Official gia color scale. Gia provides a diamond cut quality grade for standard round brilliant diamonds that fall into the d to z color range. 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. Gia also offers online only reports with full.

Gia diamond grading scales. The clarity categories and grades are. Flawless category fl diamonds have no inclusions or blemishes visible under 10x magnification. Gia developed the definitive diamond color scale or.

Very few people still cling to other grading systems and no other system has the clarity and universal acceptance of the gia scale. The universal measure of quality march 14 2013 the prospect of purchasing a diamond may seem daunting but through gia an unbiased authority on diamonds you have several handy resources to help you select the highest quality diamond. The gia system for color grading fancy color diamonds is designed to accommodate the fact that not all colored diamonds have the same depth of color. Thus the gia scale starts at the letter d.

Gia diamond grading reports are not issued for laboratory grown diamonds diamond simulants mounted diamonds or those that have undergone unstable treatments such as fracture filling or coating. The gia laboratory issues diamond grading reports for loose natural diamonds in the d to z color range that weigh 0 15 carats or more.