About us


GEM-SPHALERITE.COM is a project headed by Egor Gavrilenko, PhD, professional gemologist and gem faceting enthusiast (personal website: https://egorgavrilenko.com/)


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.


From 2000 to 2020 he worked in the Spanish Gemological Institute (IGE), as gemologist in Gem Tesing Laboratory (2000-2007), Director of Education (2007-2015) and Director of Gem Testing Laboratory (2015-2020). For five years, from 2004 to 2010, he also combined his gemological work at the 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.


Egor also is the author of the website gems-inclusions.com, dedicated to study, photography and collecting of inclusions in gemstones.


Faceting gemstones, especially Spanish gem sphalerites, and collecting rare gems and gems with rare inclusions is his passion and, since March 2020, his full time activity.


Egor Gavrilenko
NIF: 51228967D
28039 Madrid



Egor Gavrilenko






Egor Gavrilenko


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