News

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

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

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Negative quartz crystals in colourless quartz
Micrographs

Negative quartz crystals in colourless quartz

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Cartier at the V&A
Insight

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

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

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

Octahedral sylvite crystals in a Colombian emerald

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salon EPHJ 2025
Insight

GGTL Laboratories at EPHJ 2025: networking and innovation

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Trigons on the surface of a green diamond crystal.
Micrographs

Trigons on the surface of a green diamond crystal

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Throwback to GemGenève 2025.⁠ ⁠
Insight

Throwback to GemGenève 2025

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Mica crystals inside an emerald, Kafubu, Zambia.⁠ ⁠
Micrographs

Mica crystals inside an emerald, Kafubu, Zambia.

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GemGenève
Insight

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

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DFI V3
Insight

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

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