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Spiral structure in a Colombian emerald
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
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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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Jardin d’Hiver 2025 at GGTL Laboratories Switzerland
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Jardin d’Hiver 2025 at GGTL Laboratories Switzerland

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Iridescence in a rainbow andradite from Nara in Japan, moiré pattern
Micrographs

Iridescence in a rainbow andradite from Nara in Japan

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Laboratory Alert! Melee-sized HPHT Treated Yellow Diamonds appear in the Market
Publication

Lab Alert! Melee-sized HPHT Treated Yellow Diamonds appear in the Market

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Flame pattern in a non-nacreous natural pearl from Aliger gigas
Micrographs

Flame pattern in a non-nacreous natural pearl from Aliger gigas

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

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Gemmology books
Insight

Gem books you absolutely need to read!

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