Each master set is certified by GCAL by Sarine and graded to represent the top of its respective color grade (precision grade). GCAL by Sarine utilizes a dual approach—combining expert human graders with advanced Sarine AI color grading technology.

The Sarine AI system is built on extensive research and data gathered from thousands of natural diamonds accompanied by GIA grading reports. This data-driven foundation gives the Sarine system a unique advantage in tracking how diamonds are actually being graded and traded across the industry today.

By finalizing all grading at a single location against a consistent reference master set, GCAL by Sarine ensures that each set is both internally consistent and aligned with current GIA grading practices.