Skip to main content
Home

Navigation principale

  • 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

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

Read
Negative quartz crystals in colourless quartz
Micrographs
25.06.2025

Negative quartz crystals in colourless quartz

Read
Cartier at the V&A
Insight
23.06.2025

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

Read
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

Read
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

Read
Octahedral sylvite crystals in a Colombian emerald
Micrographs
11.06.2025

Octahedral sylvite crystals in a Colombian emerald

Read
salon EPHJ 2025
Insight
07.06.2025

GGTL Laboratories at EPHJ 2025: networking and innovation

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

Trigons on the surface of a green diamond crystal

Read
Throwback to GemGenève 2025.⁠ ⁠
Insight
26.05.2025

Throwback to GemGenève 2025

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

Mica crystals inside an emerald, Kafubu, Zambia.

Read
GemGenève
Insight
10.05.2025

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

Read
DFI V3
Insight
01.05.2025

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

Read

Pagination

  • Current page 1
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Page 6
  • Page 7
  • Page 8
  • Page 9
  • Next page Next ›
  • Last page Last »

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

Subscribe

* indicates required
 
 

 

LinkedIn GGTLInstagram GGTL LaboratoriesYoutube GGTL Laboratories

 

© GGTL Laboratories

Privacy - website by LUNIC