About us


GEM-SPHALERITE.COM is a project headed by Egor Gavrilenko, professional gemologist and gem faceting enthusiast.


Born in 1973 in Saint Petersburg, Russia, he graduated as Master in Geology in 1996 at Saint Petersburg State University. Since 1998 he lives in Madrid were he defended his PhD Thesis in Geology in Madrid Polytechnic University in 2004, dedicated to the study of emerald deposits in the Ural Mountains.


Since 2000 he works in the Spanish Gemological Institute (IGE), During five years, from 2004 to 2010, he was also combining his gemological work at IGE with teaching Geology at the Spanish Distance Learning University (UNED). Egor had participated in various investigation projects; he is an author of numerous scientific publications, conferences’ presentations and didactic materials in mineralogy and gemology.


Faceting gemstones, especially Spanish gem sphalerites, and collecting rare gems and gems with rare inclusions is his passion and free-time activity.



Egor Gavrilenko
NIF: 51228967D
28039 Madrid



Egor Gavrilenko






Egor Gavrilenko


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