And of all the diamond 4cs it is the most complex and technically difficult to analyze.
Gia diamond cut ratings.
And there would be no way to evaluate and discuss the qualities of an individual diamond.
Gia developed the definitive diamond color scale or.
Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades.
Available only for round diamonds our cut score takes diamond cut grades to the next level.
Those four factors color clarity cut and carat weight are the basis of the international diamond grading system that gia created in the early 1950s as the universal standard of diamonds.
And a simplified proportion.
At lumera the gia cut grade is always shown.
For standard round brilliant cut diamonds falling in the d to z color range the report also includes a.
Non standard round brilliant cut diamonds.
A description of its shape and cutting style.
To determine the cut grade of the standard round brilliant diamond the shape that dominates the majority of diamond jewelry gia calculates the proportions of those facets that influence the diamond s face up appearance.
Official gia color scale.
The gia cut grading system introduced in 2005 and validated by thousands of observations by retailers manufacturers and the public who looked at.
Stonealgo indexes over 400 000 diamond prices daily to ensure these deal ratings are fair and accurate.
At this time an overall cut grade for non standard round brilliant diamonds or fancy shaped diamonds such as rectangular oval or square is not available on gia grading reports.
Diamond professionals use the grading system developed by gia in the 1950s which established the use of four important factors to describe and classify diamonds.
While the gia ags igi egl and other grading agencies each have their own unique grading systems stonealgo s cut score is an.
This short video explains the gia clarity scale and how gia classifies diamonds with a clarity grade ranging from flawless to i 3 by using a 10x magnification loupe and a microscope to see and plot the diamond s inclusions.
But reports do contain an assessment of the diamond s polish and symmetry.
Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader.
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 diamond grading report includes an assessment of a diamond s 4cs color clarity cut and carat weight along with a plotted diagram of its clarity characteristics and a graphic representation of the diamond s proportions.
For diamonds without a gia cut grade because the diamond was certified before gia began assigning cut grades in 2005 or is a shape that gia does not currently assign cut grades to lumera will apply its own cut grade according to a proprietary formula.
