About Us
40 Years in Jewelry
GCL
Gem Certification Lab is a professional gemological laboratory based in Turkey, built on generations of expertise and powered by modern analytical technology. Our mission is to deliver accurate, honest, and internationally aligned gemstone and diamond reports.
We specialize in diamond grading, colored gemstone identification, treatment detection, composite analysis, and origin determination. Every stone is examined by certified gemologists using advanced microscopes, spectrometers, and industry standard grading environments.
Our lab provides secure, tamper-proof certificates including clarity, color, carat, treatments, composites, inclusion mapping, and country of origin. We test both loose and mounted stones with full transparency and precision.
GCL
Core Values
• Accuracy first, always.
• Traditional knowledge with scientific proof.
• Transparent results, global standards.
• Secure and reliable certification.
What We Offer
• Authenticity verification
• Treatment & composite detection
• Origin determination
• Detailed lab certification