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News

Spiral structure in a Colombian emerald
Flame pattern in a non-nacreous natural pearl from an unknown mollusc
Micrographs
14.06.2024

Flame pattern in a non-nacreous natural pearl from an unknown mollusc

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Garnet inclusion in type Ia diamond
Micrographs
14.06.2024

Garnet inclusion in type Ia diamond

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Bubbles in epoxy resin, emerald from Chivor in Colombia
Micrographs
14.06.2024

Bubbles in epoxy resin, emerald from Chivor in Colombia

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Blue residues and gas in bubbles in a green synthetic quench-cracked flame fusion sapphire
Micrographs
14.06.2024

Blue residues and gas in bubbles in a green synthetic quench-cracked flame fusion sapphire

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Light interference in a thin fracture containing artificial glassy material, ruby from Cambodia (TE2)
Micrographs
14.06.2024

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
14.06.2024

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
14.06.2024

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
31.05.2024

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

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Genève
Insight
10.05.2024

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
03.05.2024

Fibro-radiated crystallisation of Willemite

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The city of Nantes
Insight
26.04.2024

40th Anniversary of the first DUG Diploma

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inclusion of an orange pyrope almandine garnet crystal in a diamond
Micrographs
15.04.2024

Inclusion of an orange pyrope almandine garnet crystal in a diamond

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Navigation SM

  • About us
  • Services
    • Main services
      • Diamond services
      • Gem services
      • Pearl services
    • Exclusive services
      • Cleaning and sorting of chemically-unset melee diamonds
      • Cleaning & oiling of emeralds
      • Coral species identification
      • Cullinan report
    • Consulting
  • Publications
    • T. Hainschwang
    • F. Notari
    • C. Caplan
    • F. Blumentritt
    • Diplômes Universitaires de Gemmologie (D.U.G.)
  • Products
  • News
  • Contact
  • en
  • fr

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