I am Nikoleta Tzankova – gemologist, mineralogist.

As a result of my education (Bachelor’s Degree in Gemology – New Bulgarian University, Master’s degree in Applied Mineralogy – University of Mining and Geology “St. Ivan Rilski”, Ph.D. in Mineralogy and Crystallography – University of Mining and Geology “St. Ivan Rilski”, Diamond grader and colored stone grader – International Gemological Institute, Antwerp, Belgium) and more than ten years of teaching activity in University of Mining and Geology “St. Ivan Rilski” I found the joy of teaching other people, encouraging student motivation.

I teach  Mineralogy, Petrography, Gemstones identification and grading.

Professional and research interests: gemology (gemstone identification and grading, synthetics, simulants, treatments, gemological equipment, deposits), crystallography, applied mineralogy, archaeomineralogy (ancient slags, mineral and glass beads, ancient tools) – more than 30 articles and theses, 10 projects.

Professional affiliations: Bulgarian Geological Society, Union of Scientists in Bulgaria

Languages: English, Russian, Bulgarian – native

Ph.D. dissertation


Teaching activity

Head Assistant Professor at the University of Mining and Geology St. Ivan Rilski , Sofia, Bulgaria, 2008 – at present

Teaching assignments:
Bachelor’s Degree Courses:
̶ Gemology fundamentals – practical training;
̶ Mineralogy and petrography (part mineralogy) – lectures and practical training;
̶ Geology, mineralogy and petrography (part mineralogy and petrography) – lectures and practical training.

Master’s Degree Courses:
̶ Gemstone identification and grading – lectures and practical training;
̶ Gemology – practical training.

Professional development courses:
̶ Identification and grading of rough and faceted diamonds – lectures and practical training;
̶ Identification and grading of rough and faceted colored stones – lectures and practical training.

Research and projects

Professional and research interests: mineralogy, crystallography, gemology, archeomineralogy, ecology.