Precision Grading. Uncompromising Authenticity.
GCI Gemological Centers provides professional grading, gemstone identification, and jewelry appraisal reports designed to support trade and consumer confidence.
Certificate Verification Portal
Verify the authenticity of your official GCI grading report online.
Professional Gemological Assessment and Certification
GCI Gemological Centers provides comprehensive evaluation services for diamonds, colored gemstones, and fine jewelry. Our laboratory focuses on delivering accurate reports that reflect recognized gemological standards.
Every item submitted to our laboratory is examined using standardized methodologies to identify gemstone species, assess quality characteristics, and verify report data.
Our Laboratory Focus
- Diamond Assessment: Detailed analysis of Carat Weight, Color Grade, Clarity Grade, and Cut proportions.
- Gemstone Identification: Determination of gemstone variety, physical properties, and notable characteristics.
- Jewelry Documentation: Identification and documentation of mounted diamonds, gemstones, and precious metals.
Laboratory Offerings
Gemological Services
Reliable reporting and verification solutions for consumers and jewelry professionals.
Diamond Grading Reports
Systematic assessment of diamond quality factors, including carat weight, color, clarity, and cut proportions.
Gemstone Identification
Laboratory analysis to identify precious and semi-precious colored gemstone varieties and characteristics.
Jewelry Reports
Evaluation and documentation of finished jewelry items, recording metal details and mounted gemstone attributes.