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.
Gia diamond cut ratings.
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.
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.
While the gia ags igi egl and other grading agencies each have their own unique grading systems stonealgo s cut score is an.
Non standard round brilliant cut diamonds.
Each of the four c s carat weight cut color clarity is accompanied by a diamond chart illustrating the differences between grades.
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.
And a simplified proportion.
Stonealgo indexes over 400 000 diamond prices daily to ensure these deal ratings are fair and accurate.
A description of its shape and cutting style.
Here you will learn how gia diamond grades are established and how those grades affect the diamond s price.
At lumera the gia cut grade is always shown.
And of all the diamond 4cs it is the most complex and technically difficult to analyze.
And there would be no way to evaluate and discuss the qualities of an individual diamond.
The gia cut grading system introduced in 2005 and validated by thousands of observations by retailers manufacturers and the public who looked at.
Available only for round diamonds our cut score takes diamond cut grades to the next level.
Official gia color scale.
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.
Every diamond certified by the gia undergoes a thorough independent evaluation.
For standard round brilliant cut diamonds falling in the d to z color range the report also includes a.
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.
Gia developed the definitive diamond color scale or.
Many inclusions and blemishes are too tiny to be seen by anyone other than a trained diamond grader.
