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News

Spiral structure in a Colombian emerald
Sainte-Marie-aux-Mines 2025
Insight
27.06.2025

Sainte-Marie-aux-Mines 2025: 60 Years of Passion for Minerals and Gems

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Cartier at the V&A
Insight
23.06.2025

A Visit to Cartier at the V&A: When Gemmologists Go to the Museum

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Restoring the beauty of emeralds: our exclusive cleaning and oiling method
Insight
17.06.2025

Restoring the beauty of emeralds: our exclusive cleaning and oiling method

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salon EPHJ 2025
Insight
07.06.2025

GGTL Laboratories at EPHJ 2025: networking and innovation

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Throwback to GemGenève 2025.⁠ ⁠
Insight
26.05.2025

Throwback to GemGenève 2025

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GemGenève
Insight
10.05.2025

GGTL Laboratories Switzerland at GemGenève: Thank You for Stopping By!

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DFI V3
Insight
01.05.2025

DFI V3: the tool for identifying synthetic diamonds – on display at GemGenève

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D-Tect V2
Insight
01.05.2025

Discover the new D-Tect V2 at GemGenève – Booth L11

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La revue GEMMES célèbre son cinquième numéro
Insight
31.03.2025

The GEMMES journal celebrates its fifth edition

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Jardin d’Hiver 2025 at GGTL Laboratories Switzerland
Insight
10.03.2025

Jardin d’Hiver 2025 at GGTL Laboratories Switzerland

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Féodor Blumentritt Speaks on Gem Treatments at the XXI Rendez-Vous Gemmologiques de Paris
Insight
06.01.2025

Féodor Blumentritt Speaks on Gem Treatments at the XXI Rendez-Vous Gemmologiques de Paris

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Gemmology books
Insight
06.12.2024

Gem books you absolutely need to read!

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Navigation SM

  • About us
  • Services
    • Main services
      • Diamond services
      • Gem services
      • Pearl services
    • Exclusive services
      • Cleaning and sorting of chemically-unset melee diamonds
      • Cleaning & oiling of emeralds
      • Coral species identification
      • Cullinan report
    • Consulting
  • Publications
    • T. Hainschwang
    • F. Notari
    • C. Caplan
    • F. Blumentritt
    • Other
    • Diploma (D.U.G.)
  • Products
  • News
  • Contact
  • en
  • fr

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