How Azimuth Shift, Facet Yaw, and Optical Precision (Sparkle Factor 101)

This page will discuss the concepts of Azimuth Shift and Facet Yaw as they apply to matters of Optical Precision and diamond cut quality. Images provided courtesy of Brian Gavin Diamonds.

Azimuth Shift and Facet YAW as it applies to the optical precision of GIA Excellent and AGS Ideal Cut diamonds, courtesy of Brian Gavin

What causes diamond facets not to be aligned properly, Azimuth Shift and Facet YAW diagrams courtesy of Brian Gavin