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News

Spiral structure in a Colombian emerald
Flame pattern in a non-nacreous natural pearl from an unknown mollusc
Micrographs
04.03.2019

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

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Blue residues and gas in bubbles in synthetic sapphire
Micrographs
25.02.2019

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

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Ruby from Cambodia
Micrographs
18.02.2019

Ruby from Cambodia (TE2): Light interference in a thin fracture containing artificial glassy material

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GemAlliance welcomes its 5th member: the LFG
Insight
01.10.2018

GemAlliance welcomes its 5th member: the LFG

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“Boehmite Needles” in Corundum Are Rose Channels
Micrographs, Publication
28.08.2018

“Boehmite Needles” in Corundum Are Rose Channels

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GemAlliance welcomes its 4th member: the JGGL
Insight
01.06.2018

GemAlliance welcomes its 4th member: the JGGL

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AIGS & GGTL announce the launch of GemAlliance
Insight
17.11.2017

AIGS & GGTL announce the launch of GemAlliance

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Origine et croissance des minéraux des fissures alpines dans les Alpes suisses occidentales
Publication
16.12.2016

Origin and growth of alpine fissure minerals in the western Swiss Alps: record of fluid flow during exhumation

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A Lalique quartz pendant in polarized light
Publication
30.10.2015

A Lalique quartz pendant in polarized light

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Beads cut from gastropod mollusc shell disguised in a coral necklace
Publication
04.05.2015

Beads cut from gastropod mollusc shell disguised in a coral necklace

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Multi-treated HPHT-grown synthetic diamonds
Micrographs, Publication
01.09.2011

HIH: Multi-treated HPHT-grown synthetic diamonds showing some characteristics of natural diamonds

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Natural pearls of the Veneridae family
Publication
15.12.2008

Natural pearls of the Veneridae family

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  • 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
  • Products
  • News
  • Contact
  • en
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