In October 2024, GUILD Gem Lab officially released Colored Gemstone Cut Report, grading cut as a standalone category. This report quantitatively analyzes and evaluates the gemstone's cut based on three aspects: symmetry, proportions, and polish.

 

 

 

GUILD Colored Gemstone Cut Grade Scale

In GUILD Cut Grade Scale, the cut quality is classified into five grades: poor, fair, good, very good, and excellent, based on the gemstone’s proportions, symmetry, and polish. Each factor plays a significant role in the aesthetics, performance, and market value of the gemstone. Understanding the different cut grades and their characteristics can help consumers and professionals assess the quality and appeal of gemstones.

 

 

 

 Three Key Factors Of Cut Quality 

Proportion

 

Proportion refers to the relative arrangement of the various facets on a gemstone. Proper proportions are crucial for maximizing the interaction between the gemstone and light. Proportions directly affect how light enters and exits the gemstone, influencing its tone, fire, and color saturation. Improper proportions can cause window or extinction , affecting its tone and the saturation.

 

Three key factors of Cut quality

Symmetry

It refers to whether the arrangement between the various facets of a gemstone is well-balanced. Even if the proportions are proper, asymmetric facet arrangement can affect the visual aesthetics of the gemstone. Symmetry ensures uniform reflection of light on the surface and inside the gemstone, resulting in even distribution of color and brightness. If symmetry is poor, light reflection will be uneven, and light will not be able to reflect symmetrically from the gemstone, leading to uneven brightness and color.

Three key factors of Cut quality

Polish 

 

Polish refers to the smoothness of the stone's surface . A well-polished gemstone surface is extremely smooth and flawless, allowing light to pass through easily. If the polish is poor, the light will be scattered by the surface , resulting in a decrease of the gemstone's brightness and affecting its appearance.

 

  

  

GUILD Cut Report

 

 

 

GUILD Cut Report-electronic edition  

 

 

 

 

 

 

 

Advantages Of The GUILD Gemstone Cut Report

 

 

Comprehensive and Accurate Cut Grading

The GUILD Gemstone Cut Report provides a comprehensive and professional grading of the gemstone's cut based on its proportions, symmetry, and polish. Through in-depth evaluations of these key factors, the report ensures that the cut quality of each gemstone meets the highest industry standards, providing clients with a more reliable reference.

Advanced 3D Scanning and Quantitative Data Analysis

Utilizing cutting-edge 3D scanning equipment and analysis technology, the GUILD report can accurately reappear every facet detail of a gemstone. Additionally, the report provides more detailed quantitative data, including crucial cutting indicators such as Table Size, Crown Height, Pavilion Height, Total Depth, enabling clients to gain a better understanding of the gemstone's cutting quality.

Seamless Combination of Online Videos and Offline Reports

The GUILD report combines 3D scanning cutting videos, 360°panoramic videos of gemstones, and traditional paper reports, allowing clients to not only comprehensively understand every detail of the gemstone through videos but also obtain accurate data support through paper reports. This online and offline presentation method provides clients with a more intuitive and comprehensive gemstone understanding.

 

 

In the incoming future market, the GUILD Colored Gemstone Cut Report will prioritize meeting consumers' demands for high-quality colored gemstones and promoting the further refinement and popularization of colored gemstone cutting standards as its primary research objectives. It aims to better serve the jewelry industry and provide gemstone consumers with more professional and reliable gemstone testing reports.