Olena Rybnikova - Gemologist and Researcher

Olena Rybnikova

PhD in Mineralogy

Gemologist & Researcher

I'm a gemologist with a deep love for the science and beauty of gemstones. Based in Bratislava, Slovakia, I combine academic training in mineralogy with hands-on expertise to help clients make confident decisions about precious stones.

My journey into gemology began at Taras Shevchenko National University of Kyiv, where I earned my Master's degree in Gemology, Mineralogy, Geochemistry, and Petrology. I continued my academic path at Comenius University in Bratislava, where I completed my PhD in Mineralogy and Petrology, researching beryl and chrysoberyl specimens.

To complement my academic background, I obtained certifications from the Gemological Institute of America (GIA), including credentials in colored stones, diamond grading, and jewelry essentials. This combination of scientific rigor and practical gemological training allows me to provide thorough, accurate assessments for collectors, jewelers, and anyone curious about gems.

Education

Comenius University in Bratislava

Doctor of Philosophy (PhD)

Mineralogy and Gemmology

Sep 2019 – Aug 2023

Taras Shevchenko National University of Kyiv

Master's Degree

Gemology, Mineralogy, Geochemistry, Petrology

2013 – 2019

GIA Certifications

Gemological Institute of America

  • Gem IdentificationAug 2025 - ongoing
  • Gem Identification LabNov 2023
  • Colored StonesSep 2022
  • Diamonds & Diamond GradingAug 2022
  • Graduate DiamondsAug 2022
  • Applied Jewelry Professional2021
  • Diamond Essentials CertificateMar 2021
  • Colored Stone Essentials CertificateFeb 2021
  • Jewelry Essentials CertificateFeb 2021
Analyzing a green gemstone against a professional color wheel
Gemological tools including loupe and tweezers
Examining a gemstone through a loupe

Have a gemstone you'd like examined, or questions about buying one? I'd love to help.

Get in Touch