When you invest in a diamond or a rare gemstone, you deserve more than a seller’s word. Housed within the Tsiropoulos atelier, the Cyprus Gemological Laboratory (CGL) applies the same rigorous, standardised methodology to every stone it examines — whether crafted in our workshop or brought to us independently for evaluation. Each assessment follows objective scientific criteria, so your certification rests on measurable data, not opinion. We protect your investment through internationally recognised grading standards and scientific precision.

Led by Aris Tsiropoulos — an I.G.S.-certified gemologist and holder of the Gübelin Academy Coloured Gemstone Professional Programme diploma with over three decades of specialised expertise — the laboratory is trusted by private clients, insurers, and the trade alike. Utilising advanced diagnostic equipment, we confirm the authenticity, origin, and quality of every stone to ensure every assessment is delivered with absolute integrity. At CGL, we believe transparency is the foundation of the jewelry industry, providing the objective data you need to secure your legacy.