News

Spiral structure in a Colombian emerald
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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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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Disordered carbon in cryptocrystalline fuchsite from Ya'an, Sichuan, China.⁠
Micrographs

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

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D-Tect V2
Insight

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

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Cultured pearls seen under X-rays
Micrographs

Cultured pearls seen under X-rays

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Calcite crystals in NTE ruby from Mogok, Myanmar.⁠ ⁠
Micrographs

Calcite crystals in NTE ruby from Mogok, Myanmar.

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La revue GEMMES célèbre son cinquième numéro
Insight

The GEMMES journal celebrates its fifth edition

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24.21-carat yellow sapphire with characteristics similar to those found in Madagascar-origin sapphires
Micrographs

A 24.21-carat yellow sapphire with characteristics similar to those found in Madagascar-origin sapphires

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