In 2001, GCAL founded a smaller gemological lab based solely in New York City’s Diamond District. Despite its size, GCAL has built a strong reputation for high standards and offers a unique accuracy guarantee on its grading reports. GCAL issues detailed reports for natural diamonds, lab-grown diamonds, colored gemstones, pearls, and fine jewelry.
GCAL’s 8X cut grading system such as from Adiamor uniquely evaluates diamonds on polish, symmetry, proportions, optical brilliance, and scintillation, setting a high standard within the industry and highlighting GCAL’s commitment to cut quality. Additionally, GCAL has earned ISO 17025 certification, a respected international quality management standard that bolsters its reputation for consistency and accuracy across industries.
