Gübelin Gem Lab

Welcome to the Gübelin Gem Lab

The Gübelin Gem Lab was founded in 1923 as a small gemmological laboratory to examine and determine the authenticity of the stones used in Gübelin’s jewellery. This was a way to maintain the trust of its clients and stay true to its ideals. Since then the Gübelin Gem Lab has grown to become one of the most respected institutions of its kind in the world. A completely independent subsidiary of the Gübelin Group, the Gübelin Gem Lab uses the latest science and state-of-the-art equipment to carry out its analyses. On the basis of this it issues its highly respected Gemmological Reports, which are relied upon by famous auction houses, royal families, jewellers, gem traders, and collectors globally who are looking for unbiased, independent and absolutely trustworthy opinions about their gems.



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About Gem Lab

The Gubelin Gem Lab team consists of highly qualified and experienced specialists from seven different countries; between them they speak nine different languages – not forgetting “gemmology”, one of the languages they all have in common! Each team member is trained specifically in his or her field of work, such as gemmology, the operation of analytical instruments – even gemstone photography. Every gemmologist has a degree in an Earth Science (Geology, Mineralogy, Crystallography, Geography and so forth) complemented by a degree in Gemmology.

On joining the Gubelin Gem Lab team, our gemmologists complete an intensive two to three years’ internal training programme before reaching the level of expertise that enables them to append their signatures to a Gubelin report. We are proud of our expertise and our skills which, complemented with each individual’s unique personality, contribute to the strong core of our company.

Gübelin Gem Lab Seal

Ever since its establishment almost a century ago, the Gübelin Gem Lab has been pursuing the highest possible quality standards and refrained from making any compromises regarding analytical infrastructure, level of education and staff know-how as well as internal regulations and processes. To warrant and perpetuate these outstanding quality standards, the Gübelin family has provided the Gübelin Gem Lab with its very own label the Gübelin Gem Lab Seal. It stands as a quality hallmark outlining a set of guidelines that must be followed in order for it to be included on a gemmological document. Learn more

Gübelin Gem Lab Ambassadors

Our industry network, consisting of dozens of seasoned professionals from mining, the gemstone trade, jewellery and retail, is a precious asset. These experts keep us and others updated on the activities in the mines and on the markets all over the world. With various backgrounds, different positions and specialised in their respective field, they are united by their love for gemstones. With many of them, we do not only share the same passion, but also the same values and principles, which makes them perfectly positioned to act as Ambassadors for the Gübelin Gem Lab. Recently, we have nominated several such individuals to take on the role of Gübelin Gem Lab Ambassadors. They all have served the industry for many years and decades, and have earned themselves a reputation of competence, honesty and integrity. As Ambassadors, they represent our lab towards the industry and consumers in their respective section of the branch and region. While pursuing their different other businesses, and remaining independent in their activities, they also market our services for our three laboratories in Hong Kong, Switzerland and New York, in return for a commission. Our Ambassadors are entitled to negotiate customised terms for services with lab clients, and will facilitate a smooth cooperation between clients and the Gübelin Gem Lab.

We are excited to introduce to you the following individuals as Gübelin Gem Lab Ambassadors:

  • Pooja Agarwal (Singapore)

    Pooja is a Graduate Gemologist from the Gemological Association of Great Britain and also holding an IGI Diamond Grading Diploma. As a contributing editor and author to an array of international luxury watch and jewellery publications, her work has appeared in newspapers and magazines, including South China Morning Post, The Baselworld Daily News, Singapore Tatler, Haute Time and Robb Report. Extended travels around the world to various watch and jewellery trade shows in Italy, Switzerland, Middle East, America and Asia keep Pooja updated with the latest tendencies in lifestyle. Her keen eye for design and search for excellence make her an astute trends analyst.

    If you would like to reach out to Pooja, please see below her contact details:
    Email address: apooja@me.com
    Mobile number: +65 9006 1908

  • Dr. Lore Kiefert (Germany)

    She is a highly experienced laboratory gemmologist and scientific researcher, with a sound scientific background in mineralogy and over 25 years working experience in major gemmological laboratories. She held senior managerial roles at the SSEF in Switzerland and at the AGL in New York, before joining the Gübelin Gem Lab as Chief Gemmologist, a position from which she retired in September 2020. Lore has authored and co-authored numerous publications in gemmological and scientific journals, as well as chapters in textbooks such as the Handbook of Raman Spectroscopy. She regularly delivers gemmological lectures at conferences worldwide, and is also on the editorial review board of Gems & Gemology and the Journal of Gemmology.

    If you would like to reach out to Lore, please see below her contact details:
    Email address: info@gemlabhelp.com
    Mobile number: +49 171 328 8899

  • Raul Sapora (Italy)

    Raul is a gemmologist trained by DGemG and GIA. He was first introduced to the fascinating world of gemstones by his father, Diego, who was a reputable goldsmith. Raul’s long career around the globe, from the Caribbean to Africa and finally to Europe, led him to a vast experience across a diverse range of topics. These include mining, sales, responsible sourcing of gemstones and jewellery, as well as roles in auditing. He is also an enthusiast in the history of gemstones.

    If you would like to reach out to Raul, please see below his contact details:
    Email address: raul.sapora@gmail.com
    Mobile number: +39 349 087 5450

  • Dario Vanegas (Colombia)

    He is a highly recognized emerald expert in the international trade, with a deep admiration for emeralds. Being in his field for 28 years, he mainly provided support in sales and marketing for the most prominent mine owners and traders of Colombian emeralds. He acquired a vast international knowledge in cutting, cleaning and treatment of emeralds in the industry through his travel around the world. Dario is the product manager of Coscuez SA, a company of the Fura Gems group. He continues to outsource to other companies in the sector. As well, Dario does appraisals of rough and cut gemstones.

    If you would like to reach out to Dario, please see below his contact details:
    Email address: vanegasdario@hotmail.com
    Mobile number: +57 301 337 1510

Gübelin Gem Lab continues to expand its network of Ambassadors into Mainland China. We are delighted to announce the new additions of four Ambassadors who represent our lab towards consumers in their respective fields.

We warmly welcome these four outstanding professionals and we look forward to a fruitful collaboration:

  • Albert Zhang

    Mr. Zhang is the founder and co-owner CGG Jewelry Appraisal Trading Co Ltd and also currently the Ambassador of Gübelin Academy as well as the Ambassador of House of Garrard, the first British Crown Jewellers, in China. He has devoted himself to promoting luxury jewelry and lifestyles in mainland China.

    If you would like to reach out to Albert, please see below his contact details:
    Email address: gubelin@cgg.cn
    Mobile number: +86 21 5309 8773

  • Jenny Jing

    Ms. Jing is the Executive Publisher and Editor-in-Chief of Bazaar Jewelry magazine. Furthermore, she is a visiting Professor of the Tongji University of Design and Innovation. With a long commitment in the dissemination of fashion and jewelry culture, Ms. Jing is regarded as a dominating influencer in these fields.

  • Guo Ying

    Professor Guo is the Dean of the School of Gemmology, China University of Geosciences in Beijing. He focuses on the research of gemology, mineralogy and traditional Chinese jade culture. He frequently shares his vast knowledge on these fields in interviews conducted by major mass media stations such as CCTV, CNR and BTV.

  • Fan Bingbing

    Ms. Fan requires no further introduction as she is a well renowned and famous actress, model and television producer in China. She has won many prestigious awards such as from the Tokyo International Film Festival, San Sebastian International Film Festival, Golden Horse Film Festival and Awards and the Golden Rooster Awards. Due to her astounding appearances on the red carpet at movie premieres and fashion shows, Ms. Fan is reckoned as a global fashion icon.

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