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Spiral structure in a Colombian emerald
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
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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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"Platelets" in an aquamarine
Micrographs

"Platelets" in an aquamarine

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Unheated green sapphire from Anakie, Queensland, Australia
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Unheated green sapphire from Anakie, Queensland, Australia

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Digitized cavities, containing crystals and gas bubbles in an emerald from Davdar, China
Micrographs

Digitized cavities, containing crystals and gas bubbles in an emerald from Davdar, China

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Flat cavity containing a gas bubble in an unheated yellow sapphire from Sri-Lanka
Micrographs

Flat cavity containing a gas bubble in an unheated yellow sapphire from Sri-Lanka

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Blue magmatic-related sapphire from Issoire, Puy-de-Dôme, France, unheated.
Micrographs

Unheated blue magmatic-related sapphire from Puy-de-Dôme, France

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Margarite crystals in an unheated ruby from Mozambique
Micrographs

Margarite crystals in an unheated ruby from Mozambique

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