Even if the depth is ideal, poor symmetry can skew the light performance, causing the diamond to tilt off-axis and leak light asymmetrically. Advanced Analysis and Symmetry Considerations Professional grading reports include the depth percentage, but the y axis analysis is often combined with evaluations of symmetry and polish.
Analyzing the Y Axis and Symmetry for Diamond Sparkle
" Careful analysis of the y axis measurement helps predict whether a diamond will sparkle vividly or appear dull under normal lighting conditions. Table of Common Depth Percentage Ranges Category Depth Percentage Range Ideal 59% - 62% Excellent 62.
The diagram typically features a horizontal x axis representing the table percentage, which measures the width of the flat top facet. A diamond with a depth percentage that is too high will appear thin and spread light horizontally, reducing fire and creating a darker appearance.
Analyzing the Y Axis and Symmetry for Diamond Sparkle
1% - 73% Fair/Poor 62% (low) Impact on Brilliance and Fire The positioning of a diamond’s depth on the y axis is directly correlated to its ability to return white light as brilliance and colored light as fire. Modern imaging technologies allow for precise 3D mapping of the y axis data, providing a detailed view of how the diamond’s proportions adhere to mathematical ideals.
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More perspective on Y axis for diamonds can make the topic easier to follow by connecting earlier points with a few simple takeaways.
