News

Spiral structure in a Colombian emerald
Light interference in a thin fracture containing artificial glassy material, ruby from Cambodia (TE2)
Micrographs

Light interference in a thin fracture containing artificial glassy material, ruby from Cambodia (TE2)

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Cavity filling (C2) in a ruby from Mong Hsu in Myanmar
Micrographs

Cavity filling (C2) in a ruby from Mong Hsu in Myanmar

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Elongated biotite crystal inclusion with interface light interference, Aquamarine, Madagascar
Micrographs

Elongated biotite crystal inclusion with interface light interference, Aquamarine, Madagascar

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rutile needles partially altered in a Ruby from Mogok (TE2)
Micrographs

Rutile needles partially altered in a Ruby from Mogok (TE2)

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Genève
Insight

GGTL Laboratories Switzerland visiting presence at GemGenève

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Fibro-radiated crystallisation of Willemite Zn2SiO4 coloured by cobalt on the surface of a glaze
Micrographs, Publication

Fibro-radiated crystallisation of Willemite

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The city of Nantes
Insight

40th Anniversary of the first DUG Diploma

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inclusion of an orange pyrope almandine garnet crystal in a diamond
Micrographs

Inclusion of an orange pyrope almandine garnet crystal in a diamond

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GGTL Laboratories Switzerland at Watches & Wonders
Insight

GGTL Laboratories Switzerland visit at Watches & Wonders

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Couverture du magazine Gemmologie et Francophonie
Insight

Discover the issue 3 of GEMMES: Celebrating spring and francophonie!

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Automorphous phenacite crystals in a synthetic emerald
Micrographs

Automorphous phenacite crystals in a synthetic emerald

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Automorphous margarite crystals in an unheated ruby from Mozambique
Micrographs

Automorphous margarite crystals in an unheated ruby from Mozambique

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