To ensure consistency, each master stone is graded multiple times using both advanced Sarine AI color grading technology and human expert review. The Sarine AI system uses high-precision cameras, lenses, and controlled lighting conditions. It is calibrated multiple times daily, and each scan is verified for proper alignment and calibration.

The system maintains a deviation tolerance of ±0.10 of a numeric grade. Each color grade represents a 1.00 numeric range, and only diamonds falling within the top 20% of a given grade (top 1/5) are considered eligible as potential master stones.

This rigorous technological framework, combined with expert oversight and finalization in a single lab location, ensures the highest level of consistency and reliability across all master sets.