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News

Spiral structure in a Colombian emerald
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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Coloured glass coating of quartz beads before the 13th century: An undocumented sapphire imitation
Publication
12.06.2025

Coloured glass coating of quartz beads before the 13th century: An undocumented sapphire imitation

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Octahedral sylvite crystals in a Colombian emerald
Micrographs
11.06.2025

Octahedral sylvite crystals in a Colombian emerald

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salon EPHJ 2025
Insight
07.06.2025

GGTL Laboratories at EPHJ 2025: networking and innovation

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Trigons on the surface of a green diamond crystal.
Micrographs
28.05.2025

Trigons on the surface of a green diamond crystal

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Throwback to GemGenève 2025.⁠ ⁠
Insight
26.05.2025

Throwback to GemGenève 2025

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Mica crystals inside an emerald, Kafubu, Zambia.⁠ ⁠
Micrographs
14.05.2025

Mica crystals inside an emerald, Kafubu, Zambia.

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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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Disordered carbon in cryptocrystalline fuchsite from Ya'an, Sichuan, China.⁠
Micrographs
01.05.2025

Disordered carbon in cryptocrystalline fuchsite from Ya'an, Sichuan, China

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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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Cultured pearls seen under X-rays
Micrographs
23.04.2025

Cultured pearls seen under X-rays

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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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