GIA 4Cs Guide

所有新GIA的4C標準交互工具。

GIA’s 4Cs app features video and interactive tools that teach consumers about how GIA grades color, cut, clarity and carat weight. It explains GIA’s D-to-Z color scale and how diamond color can affect value, GIA’s clarity scale and how diamond clarity can affect value, the factors that affect a diamond’s cut grade and the origins of the carat system.

Interactive tools show:

- How diamond color changes across the GIA D-to-Z Color Scale

- Typical inclusions and blemishes at various points in the GIA Clarity Scale

- A diamond’s anatomy and how various parameters influence a diamond’s cut grade

- How a diamond’s size changes by carat weight and enables consumers to compare the sizes of different diamonds

- An interactive GIA Grading Report Anatomy – to help consumers understand the different elements of a GIA report

Additional features include:

- Retailer Lookup (network connection required) allows consumers to find retailers that sell GIA-graded diamonds and/or have GIA-trained sales associates.

- Information on fluorescence, common diamond treatments, synthetics and simulants.

- Direct Access to GIA Report Check (network connection required) - GIA’s online database of reports. Consumers can verify the contents of a GIA report and view a PDF version of that report simply by entering a GIA report number.