GCI Gemological Centers • Diamond & Gemstone Certification Services
Online Certificate Verification Available 24/7
Gemological Laboratory & Certification

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.

Enter the unique report number printed on your GCI certificate document to confirm report records.

Gemological AnalysisScientific Evaluation
Report AuthenticityVerification Support
Comprehensive ReportsDiamond & Gemstone Grading
Standardized MethodologyIndustry Accepted Scales
About GCI Gemological Centers

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.

Have a GCI Certificate to Verify?

Use our central verification portal or contact our laboratory registrar for assistance.