Diamond Rating & Grading Charts - American Gem Society
This diamond rating chart can help you choose the right gem. Learn the color and clarity criteria by which diamonds are graded for valuation purposes.
GIA Diamond Grading Scales: Universal Quality Measure - GIA 4Cs
2013年3月14日 · 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. First up, an overview of the 4Cs: Color, Clarity, Cut, and Carat Weight.
GIA Cut Grading System Charts and Booklets
Estimating a Cut Grade Using the GIA Diamond Cut Grading System Explains the system, gives definitions, and displays the proportions listed on a GIA Diamond Grading report.
GIA Diamond Grading | GIA 4Cs
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments. It also includes a plotted diagram which maps your diamond, identifying its unique characteristics. The GIA Diamond Origin Report.
Diamond Color Chart: The Official GIA Color Scale
2015年7月8日 · 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.
Diamond Grading Chart and Diamond Certification Guide - Helzberg Diamonds
Diamond grading reports, based on internationally recognized diamond grading standards, provide buyers with assurance that they are purchasing a quality stone. Many of our diamonds have been graded by some of the most trusted third-party labs in the industry, such as AGS, GIA® and GCAL.
The GIA Diamond Grading Report includes an assessment of the 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.
Diamond Grading Chart – AGI | International Gemological …
AGI’s diamond clarity scale has 11 grades ranging from Flawless (FL) to Included (I). The classification system focuses on how difficult it is for a skilled grader to see inclusions and blemishes under 10x magnification.
4 C's of Diamonds | Diamond Grading Chart
Complete guide to the 4 C's of diamonds; Cut, Color, Clarity, and Carat weight. Including charts and guides showing how diamond grades affect appearance and value.
Diamond Chart - Diamond Valuation - Diamond Rating System
Below is a diamond chart with a rating system that will help you to evaluate stones of specific color and diamond clarity combinations. This diamond chart compares diamonds starting with the most prized color D (colorless) and balances them with loose diamonds of various clarity.