Gübelin Gem Lab Ambassadors

A selected group of people from our industry has been nominated to act as Gübelin Gem Lab Ambassadors. They all have fundamental knowledge and experience in the gemstone and jewellery sector and are coming from various geographic areas.

As Ambassadors, they represent our lab towards the industry and consumers in their respective field. 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. In their function as our Ambassadors they will carry out activities such as negotiating customised terms for our services or ease the interaction and communication between clients and our team.

We are happy 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:
    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:
    Mobile number: +49 171 328 8899

  • Raul Sapora (Italy)

    Raul is a gemmologist trained by DGemD 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:
    Mombile 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:
    Mobile number: +57 301 337 1510