Initial candidates for the master sets are selected using Sarine AI color grading systems from thousands of diamonds at the manufacturing level. These pre-screened diamonds are then sorted and evaluated by Stuller to ensure they meet all specified criteria.

Selected stones are sent to GCAL by Sarine’s New York City laboratory, where they undergo additional AI grading, followed by final analysis and approval by several senior expert graders. This multi-step process ensures precision, consistency, and compliance with strict grading standards, and each stone is accompanied by a GCAL Certificate.