The Cyprus Gemological Laboratory (CGL) has served the diamond and gemstone market in Cyprus since 2000. Whether you are buying, selling, insuring or simply want to understand a stone you already own, knowing its true identity, quality and characteristics matters. A CGL certificate gives you a clear, documented record, prepared to internationally recognised grading standards.

The laboratory is equipped with advanced instruments, including Raman spectroscopy, an electronic gemstone spectrometer, UNOscope HD and short-wave and long-wave ultraviolet testing, allowing precise identification and grading of diamonds and coloured gemstones.

Our Gemologist

CGL is led by its founder, Aris Tsiropoulos, a gemologist with over three decades of experience and a lifelong commitment to professional education:

Coloured Gem Professional Diploma, Gübelin Academy, Switzerland (2024)
Professional Gemologist, International Gem Society (IGS), Member #103603 (2007)
Diploma in Diamantology, School of Diamantology, Cyprus (2001)
Certificate in Gemmology, Master Gem Gemmological Laboratory, affiliated with Gem-A, Great Britain (1997)
International School of Gemology certifications in coloured gemstones, gemstone treatments and laboratory-grown gemstones (2020)
Member of the organising committee, 5th Mediterranean Gemmological & Jewellery Conference, Cyprus (2019)

Through continuous study and professional membership of the International Gem Society, CGL stays current with the latest developments in gemstone identification, treatments and laboratory-grown diamonds.