LFG Laboratory

Our missions

The LFG is the world's oldest gemmological laboratory, founded in 1929 by the Chambre Syndicale du Diamant.

The Laboratoire Français de Gemmologie (LFG) became part of the Union BJOP in 2011 and continues its mission of providing the public with independent gem expertise for the information and safety of consumers.

Now located in the heart of Paris, in the 2nd arrondissement, the LFG is the only one in France to provide analysis reports on all gems,

diamonds, coloured stones and pearls, in terms of their identity (naturalness, treatment), their shape, their characteristics (4C gradation for diamonds), their colours and their geographical origin. ## In parallel, the LFG is involved in in-depth gemmological research in collaboration with universities, putting forward high-level technological support.
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Our analyses

A benchmark in the world of jewelry, the Laboratory is equipped with high-performance, high-tech equipment available to all jewelry professionals and private individuals : traders, brokers, manufacturers, retailers, etc.

Analyses are carried out according to rigorous protocols. The results are validated by several gemologists under the supervision of the laboratory director and manager.
View our range of analyses

Our Certifications and Accreditations

Cofrac

Since 2021, the Laboratory's analyses have been accredited by COFRAC to ISO 17025
(Accreditation no. 1-6767, scope available at www.cofrac.fr).

The LFG has also held ISO 9001 quality management system certification since 2017.

Since 2013, the LFG is certified RJC (Responsible Jewellery Council). 

These certifications and accreditations reinforce the LFG's position as a leader in gemmological analysis. They ensure the safety of the analyses and reinforce the confidence that customers have with the laboratory.

Our reports

Regardless of the gemstones or jewelry, the LFG offers 3 categories of gemmological report according to your needs:

    Preliminary Exam

    A 1st identification before purchasing stock or cutting stone - A4 Letter

    Analysis Report

    The classical and complete analysis report for the end-buyer - A5 bristol booklet.

    Elite Report

    The prestigious, tailor-made analysis report, highlighting the exceptional stones and jewels - A4 landscape format triptych folder.

All types of analysis and reports
 

Preliminary exam

Letter A4

Analysis report

Bristol booklet A5

Elite report

Triptych landscape folder A4

Diamond, coloured stones and cultured pearls
Diamond, coloured stones and natural pearls
Exceptional stones and jewellery
Identification
Shape, cut, measurements and mass, treatment and colour
Geographical origin
Photos
3D Video and scan
Storytelling : history, rocks and geographical origins
Monograph and scientific data: spectroscopy…
Only for isolated diamond, not set on jewelry
Clarity and luminescence
Cut, polish, symmetry, diamond's type
Proportions and clarity diagrams
Laser inscription number

* Preliminary exam with origin reserved only for professionals